OpenAI API listing

GPT-5.6 Sol API pricing on OpenAI

OpenAI's published API listing for GPT-5.6 Sol, with native prices and dated evidence. Check the official source for current availability and account eligibility.

Headline USD token rates per 1M; other currencies and units remain native. Original rates are below. Unknown means no unambiguous headline; inspect all rates and conditions below.
API listingInputCache readOutputCapability (Epoch AI)
GPT-5.6 SolUSD 4.00 / 1M tokensshort contextUSD 0.40 / 1M tokensshort contextUSD 20.00 / 1M tokensshort contextFrontier · ECI 162.6 (90% range 159.6–166.2) · range spans bands · Epoch AI score for GPT-5.6 Sol, model dated 2026-07-09

Rates, billing conditions and sources

GPT-5.6 Sol

Service ID: gpt-5.6-sol · Context window: 1.05M tokens · Listing status: active

Promotional price: available at least through 2026-11-21; end date not announced

All rates, conditions and sources

Promotional price: available at least through 2026-11-21; end date not announced. The source states a minimum availability date, not an end date; see the conditions.

Input: USD 4.00 / 1M tokens · Standard · Modality: unspecified

Region: global · Endpoint scope: global · Tier: standard · Billing: Unknown · Prompt bracket: none stated · Cache TTL: Unknown seconds · Valid through: Unknown

  • Short context; numeric threshold is unknown in this source.
  • OpenAI direct Standard only; excludes Batch, Flex, Fast, Ultrafast and AWS/Azure billing. Regional eligibility is not established.
  • Regional processing (data residency) endpoints are charged a 10% uplift for models released on or after March 5, 2026. Starting Nov 1, 2026, FedRAMP endpoints are also charged a 10% uplift. Priority processing was renamed Fast mode on July 30, 2026. GPT-5.6 Sol’s promotional pricing is available at least through November 21, 2026.

Output: USD 20.00 / 1M tokens · Standard · Modality: unspecified

Region: global · Endpoint scope: global · Tier: standard · Billing: Unknown · Prompt bracket: none stated · Cache TTL: Unknown seconds · Valid through: Unknown

  • Short context; numeric threshold is unknown in this source.
  • OpenAI direct Standard only; excludes Batch, Flex, Fast, Ultrafast and AWS/Azure billing. Regional eligibility is not established.
  • Regional processing (data residency) endpoints are charged a 10% uplift for models released on or after March 5, 2026. Starting Nov 1, 2026, FedRAMP endpoints are also charged a 10% uplift. Priority processing was renamed Fast mode on July 30, 2026. GPT-5.6 Sol’s promotional pricing is available at least through November 21, 2026.

Cache read: USD 0.40 / 1M tokens · Standard · Modality: unspecified

Region: global · Endpoint scope: global · Tier: standard · Billing: Unknown · Prompt bracket: none stated · Cache TTL: Unknown seconds · Valid through: Unknown

  • Short context; numeric threshold is unknown in this source.
  • OpenAI direct Standard only; excludes Batch, Flex, Fast, Ultrafast and AWS/Azure billing. Regional eligibility is not established.
  • Regional processing (data residency) endpoints are charged a 10% uplift for models released on or after March 5, 2026. Starting Nov 1, 2026, FedRAMP endpoints are also charged a 10% uplift. Priority processing was renamed Fast mode on July 30, 2026. GPT-5.6 Sol’s promotional pricing is available at least through November 21, 2026.

Cache write: USD 5.00 / 1M tokens · Standard · Modality: unspecified

Region: global · Endpoint scope: global · Tier: standard · Billing: Unknown · Prompt bracket: none stated · Cache TTL: 1800 seconds · Valid through: Unknown

  • Short context; numeric threshold is unknown in this source.
  • OpenAI direct Standard only; excludes Batch, Flex, Fast, Ultrafast and AWS/Azure billing. Regional eligibility is not established.
  • Regional processing (data residency) endpoints are charged a 10% uplift for models released on or after March 5, 2026. Starting Nov 1, 2026, FedRAMP endpoints are also charged a 10% uplift. Priority processing was renamed Fast mode on July 30, 2026. GPT-5.6 Sol’s promotional pricing is available at least through November 21, 2026.

Cache write: USD 10.00 / 1M tokens · Standard · Modality: unspecified

Region: global · Endpoint scope: global · Tier: standard · Billing: Unknown · Prompt bracket: none stated · Cache TTL: 43200 seconds · Valid through: Unknown

  • Short context; numeric threshold is unknown in this source.
  • OpenAI direct Standard only; excludes Batch, Flex, Fast, Ultrafast and AWS/Azure billing. Regional eligibility is not established.
  • Regional processing (data residency) endpoints are charged a 10% uplift for models released on or after March 5, 2026. Starting Nov 1, 2026, FedRAMP endpoints are also charged a 10% uplift. Priority processing was renamed Fast mode on July 30, 2026. GPT-5.6 Sol’s promotional pricing is available at least through November 21, 2026.

Input: USD 8.00 / 1M tokens · Standard · Modality: unspecified

Region: global · Endpoint scope: global · Tier: standard · Billing: Unknown · Prompt bracket: none stated · Cache TTL: Unknown seconds · Valid through: Unknown

  • Long context; numeric threshold is unknown in this source.
  • OpenAI direct Standard only; excludes Batch, Flex, Fast, Ultrafast and AWS/Azure billing. Regional eligibility is not established.
  • Regional processing (data residency) endpoints are charged a 10% uplift for models released on or after March 5, 2026. Starting Nov 1, 2026, FedRAMP endpoints are also charged a 10% uplift. Priority processing was renamed Fast mode on July 30, 2026. GPT-5.6 Sol’s promotional pricing is available at least through November 21, 2026.

Output: USD 30.00 / 1M tokens · Standard · Modality: unspecified

Region: global · Endpoint scope: global · Tier: standard · Billing: Unknown · Prompt bracket: none stated · Cache TTL: Unknown seconds · Valid through: Unknown

  • Long context; numeric threshold is unknown in this source.
  • OpenAI direct Standard only; excludes Batch, Flex, Fast, Ultrafast and AWS/Azure billing. Regional eligibility is not established.
  • Regional processing (data residency) endpoints are charged a 10% uplift for models released on or after March 5, 2026. Starting Nov 1, 2026, FedRAMP endpoints are also charged a 10% uplift. Priority processing was renamed Fast mode on July 30, 2026. GPT-5.6 Sol’s promotional pricing is available at least through November 21, 2026.

Cache read: USD 0.80 / 1M tokens · Standard · Modality: unspecified

Region: global · Endpoint scope: global · Tier: standard · Billing: Unknown · Prompt bracket: none stated · Cache TTL: Unknown seconds · Valid through: Unknown

  • Long context; numeric threshold is unknown in this source.
  • OpenAI direct Standard only; excludes Batch, Flex, Fast, Ultrafast and AWS/Azure billing. Regional eligibility is not established.
  • Regional processing (data residency) endpoints are charged a 10% uplift for models released on or after March 5, 2026. Starting Nov 1, 2026, FedRAMP endpoints are also charged a 10% uplift. Priority processing was renamed Fast mode on July 30, 2026. GPT-5.6 Sol’s promotional pricing is available at least through November 21, 2026.

Cache write: USD 10.00 / 1M tokens · Standard · Modality: unspecified

Region: global · Endpoint scope: global · Tier: standard · Billing: Unknown · Prompt bracket: none stated · Cache TTL: 1800 seconds · Valid through: Unknown

  • Long context; numeric threshold is unknown in this source.
  • OpenAI direct Standard only; excludes Batch, Flex, Fast, Ultrafast and AWS/Azure billing. Regional eligibility is not established.
  • Regional processing (data residency) endpoints are charged a 10% uplift for models released on or after March 5, 2026. Starting Nov 1, 2026, FedRAMP endpoints are also charged a 10% uplift. Priority processing was renamed Fast mode on July 30, 2026. GPT-5.6 Sol’s promotional pricing is available at least through November 21, 2026.

Cache write: USD 20.00 / 1M tokens · Standard · Modality: unspecified

Region: global · Endpoint scope: global · Tier: standard · Billing: Unknown · Prompt bracket: none stated · Cache TTL: 43200 seconds · Valid through: Unknown

  • Long context; numeric threshold is unknown in this source.
  • OpenAI direct Standard only; excludes Batch, Flex, Fast, Ultrafast and AWS/Azure billing. Regional eligibility is not established.
  • Regional processing (data residency) endpoints are charged a 10% uplift for models released on or after March 5, 2026. Starting Nov 1, 2026, FedRAMP endpoints are also charged a 10% uplift. Priority processing was renamed Fast mode on July 30, 2026. GPT-5.6 Sol’s promotional pricing is available at least through November 21, 2026.

Developer: Unknown / not verified · API seller: OpenAI

Checkpoint: Unknown / not verified · Lineage: Unknown / not verified

Official pricing ↗

Price observed: 2026-11-02T04:26:58.312Z · Price source checked: 2026-11-02T04:26:58.312Z · Price freshness: fresh

Weight-license reviewed: Unknown. Open weights do not establish permission for every commercial use; consult the linked terms.

Gating: unknown · Code license: Unknown / not verified · API availability: available (dated observation, not a live service check)

Source, conditions and dates

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-6-sol: identity · openai-gpt-5-6-sol: pricing · openai-gpt-5-6-sol: availability · openai-gpt-5-6-sol: specifications · Retrieved · Effective: Unknown · Checked: Unknown · Reviewed: Unknown · Review after: Unknown · Freshness: unknown · Confidence: A

  • Standard short-context rate; cache writes and long-context requests have separate prices.

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-6-sol: weightAccess · Retrieved · Effective: Unknown · Checked: Unknown · Reviewed: Unknown · Review after: Unknown · Freshness: unknown · Confidence: Unknown

  • The official GPT-5.6 Sol model page describes API endpoints, features and model aliases; this review did not establish explicit weight-release or non-downloadability evidence.
  • Review outcome: unknown. No explicit model-specific weight-availability statement was established in the reviewed source; this is not evidence of non-downloadability. No download URL or weight license is asserted.

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-4-mini: pricing · openai-gpt-5-4-nano: pricing · openai-gpt-5-6-luna: pricing · openai-gpt-5-6-sol: pricing · openai-gpt-5-6-terra: pricing · openai-gpt-6-astra: pricing · openai-gpt-6-sol: pricing · openai-gpt-6-luna: pricing · Retrieved · Effective: Unknown · Checked: 2026-09-29T04:37:31.867Z · Reviewed: Unknown · Review after: Unknown · Freshness: unknown · Confidence: A

  • Raw SHA-256: 0de899a93b1d9a8c7cf7b3a01ed3553337636c7ff374153821f218a203a203c8; collector openai-standard-2.
  • Pricing observation only; no new access, availability, context threshold, regional eligibility or release metadata assertions.

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-4-mini: pricing · openai-gpt-5-4-nano: pricing · openai-gpt-5-6-luna: pricing · openai-gpt-5-6-sol: pricing · openai-gpt-5-6-terra: pricing · openai-gpt-6-astra: pricing · openai-gpt-6-sol: pricing · openai-gpt-6-luna: pricing · Retrieved · Effective: Unknown · Checked: 2026-10-02T04:37:28.050Z · Reviewed: Unknown · Review after: Unknown · Freshness: unknown · Confidence: A

  • Raw SHA-256: 0d9fb6b240209bb7b5a05d1d6ce0b8a796e0924b7e34c5ab183a3f1f890febe6; collector openai-standard-2.
  • Pricing observation only; no new access, availability, context threshold, regional eligibility or release metadata assertions.

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-4-mini: pricing · openai-gpt-5-4-nano: pricing · openai-gpt-5-6-luna: pricing · openai-gpt-5-6-sol: pricing · openai-gpt-5-6-terra: pricing · openai-gpt-6-astra: pricing · openai-gpt-6-sol: pricing · openai-gpt-6-luna: pricing · openai-gpt-6-1-sol: pricing · Retrieved · Effective: Unknown · Checked: 2026-10-07T04:38:54.800Z · Reviewed: Unknown · Review after: Unknown · Freshness: unknown · Confidence: A

  • Raw SHA-256: 0d9fb6b240209bb7b5a05d1d6ce0b8a796e0924b7e34c5ab183a3f1f890febe6; collector openai-standard-2.
  • Pricing observation only; no new access, availability, context threshold, regional eligibility or release metadata assertions.

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-4-mini: pricing · openai-gpt-5-4-nano: pricing · openai-gpt-5-6-luna: pricing · openai-gpt-5-6-sol: pricing · openai-gpt-5-6-terra: pricing · openai-gpt-6-astra: pricing · openai-gpt-6-sol: pricing · openai-gpt-6-luna: pricing · openai-gpt-6-1-sol: pricing · Retrieved · Effective: Unknown · Checked: 2026-10-09T04:40:13.300Z · Reviewed: Unknown · Review after: Unknown · Freshness: unknown · Confidence: A

  • Raw SHA-256: 6162b98d33e8b74bff8c2ffeb2fa9e330b2101280464b441729c350831fec2c8; collector openai-standard-2.
  • Pricing observation only; no new access, availability, context threshold, regional eligibility or release metadata assertions.

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-4-mini: pricing · openai-gpt-5-4-nano: pricing · openai-gpt-5-6-luna: pricing · openai-gpt-5-6-sol: pricing · openai-gpt-5-6-terra: pricing · openai-gpt-6-astra: pricing · openai-gpt-6-sol: pricing · openai-gpt-6-luna: pricing · openai-gpt-6-1-sol: pricing · Retrieved · Effective: Unknown · Checked: 2026-10-18T04:34:03.415Z · Reviewed: Unknown · Review after: 2026-10-28T04:34:03.415Z · Freshness: stale · Confidence: A

  • Raw SHA-256: e0767b5009dcc929a2f9eeb9ce6096a57ff12e5d8c011de9d69ff145aef2fc28; collector openai-standard-2.
  • Pricing observation only; no new access, availability, context threshold, regional eligibility or release metadata assertions.

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-6-sol: specifications · Retrieved · Effective: Unknown · Checked: 2026-10-13T18:43:41Z · Reviewed: 2026-10-14T00:43:53Z · Review after: Unknown · Freshness: unknown · Confidence: A

  • Official OpenAI model page for GPT-5.6 Sol, raw SHA-256 c4f365a72f0c4e38f7cf0e3bbd545c0b360adbbdd5e067ff0255160d618381b1: "1,050,000 context window" and "128,000 max output tokens" (output length is not listed separately on this site).
  • Specifications only: no pricing, availability, capability or release-date assertion.

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-4-mini: pricing · openai-gpt-5-4-nano: pricing · openai-gpt-5-6-luna: pricing · openai-gpt-5-6-sol: pricing · openai-gpt-5-6-terra: pricing · openai-gpt-6-astra: pricing · openai-gpt-6-sol: pricing · openai-gpt-6-luna: pricing · openai-gpt-6-1-sol: pricing · Retrieved · Effective: Unknown · Checked: 2026-10-26T00:59:52.153Z · Reviewed: Unknown · Review after: 2026-11-05T00:59:52.153Z · Freshness: stale · Confidence: A

  • Raw SHA-256: 606acc6693f882253e203e30da2fbfd23f28b02540a98f26fce93c5cdc04e9dd; collector openai-standard-2.
  • Pricing observation only; no new access, availability, context threshold, regional eligibility or release metadata assertions.

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-4-mini: pricing · openai-gpt-5-4-nano: pricing · openai-gpt-5-6-luna: pricing · openai-gpt-5-6-sol: pricing · openai-gpt-5-6-terra: pricing · openai-gpt-6-astra: pricing · openai-gpt-6-sol: pricing · openai-gpt-6-luna: pricing · openai-gpt-6-1-sol: pricing · Retrieved · Effective: Unknown · Checked: 2026-10-27T05:39:15.293Z · Reviewed: Unknown · Review after: 2026-11-06T05:39:15.293Z · Freshness: stale · Confidence: A

  • Raw SHA-256: 93d302a9b7a384877533bc3ab5bb48eebf4b56bd6add0f194095054b2a13f952; collector openai-standard-2.
  • Pricing observation only; no new access, availability, context threshold, regional eligibility or release metadata assertions.

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-4-mini: pricing · openai-gpt-5-4-nano: pricing · openai-gpt-5-6-luna: pricing · openai-gpt-5-6-sol: pricing · openai-gpt-5-6-terra: pricing · openai-gpt-6-astra: pricing · openai-gpt-6-sol: pricing · openai-gpt-6-luna: pricing · openai-gpt-6-1-sol: pricing · openai-gpt-6-1-terra: pricing · Retrieved · Effective: Unknown · Checked: 2026-10-28T04:28:43.456Z · Reviewed: Unknown · Review after: 2026-11-07T04:28:43.456Z · Freshness: stale · Confidence: A

  • Raw SHA-256: 93d302a9b7a384877533bc3ab5bb48eebf4b56bd6add0f194095054b2a13f952; collector openai-standard-2.
  • Pricing observation only; no new access, availability, context threshold, regional eligibility or release metadata assertions.

Primary source ↗ · vendor-docs · Claims: openai-gpt-5-4-mini: pricing · openai-gpt-5-4-nano: pricing · openai-gpt-5-6-luna: pricing · openai-gpt-5-6-sol: pricing · openai-gpt-5-6-terra: pricing · openai-gpt-6-astra: pricing · openai-gpt-6-sol: pricing · openai-gpt-6-luna: pricing · openai-gpt-6-1-sol: pricing · openai-gpt-6-1-terra: pricing · Retrieved · Effective: Unknown · Checked: 2026-11-02T04:26:58.312Z · Reviewed: Unknown · Review after: 2026-11-12T04:26:58.312Z · Freshness: fresh · Confidence: A

  • Raw SHA-256: 56e3da9bb29246cad60003e01f3fdc6b536149a09f5effe5e79af020a4922cfc; collector openai-standard-2.
  • Pricing observation only; no new access, availability, context threshold, regional eligibility or release metadata assertions.
About capability scores (Epoch AI)

Capability scores: Epoch AI, 'Capabilities & benchmarking'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks' [online resource], epoch.ai/benchmarks. Accessed 2026-10-31. Licensed CC BY 4.0; values here are rounded to one decimal place and grouped into bands.

The Epoch Capabilities Index (ECI) combines many benchmarks on a scale where Claude 3.5 Sonnet is 130 and GPT-5 is 150. Bands, on the displayed one-decimal score: Frontier 160+, Strong 150–159.9, Capable 140–149.9, Entry below 140. Each score has a 90% range; a range that crosses a band boundary is flagged. Models are not ranked: neighbouring scores often overlap.

A benchmark is not your workload. Epoch's scores mostly reflect runs at the highest reasoning effort, which use more output tokens than default settings. Scores are dated and can shift between Epoch releases. A score belongs to the developer's model; a host listing shows the same model's score, but hosts may serve different versions or quantizations.

How headline rates are chosen

Headline rates use the directory's shared rule: the rate a buyer meets by default, chosen by billing, tier and context dimensions and never by price. Context caps, the bracket starting at zero and short-context variants are labeled; unverified availability is flagged and is not a service guarantee. Batch, off-peak and other variants remain in the details; ambiguous headlines stay unknown.

No currency conversion is performed. Missing cache prices are unknown, not zero. Equal units do not establish equivalent models or service conditions. See the methodology and source register.