GPT-5.6 Terra
API ID gpt-5.6-terra
gpt-5.6-terra is an OpenAI model, released July 2026. It has a 1,050,000-token context window and up to 128,000 output tokens. It takes image input and supports function calling, structured outputs and reasoning. Standard price: from $2.00 input and from $12.00 output per 1M tokens.
- Status
- Active
- Released
- July 2026
- Shutdown
- none announced
- Replacement
- —
No deprecation or shutdown date has been announced as of October 15, 2026.
Free tier: Free for shared data, 10M tokens a day for Launch and Grow (2.5M for Build), in place when tracking began (October 12, 2026) (source) · All free models
Benchmarks
Scores as each source published themComparing with GPT-5 mini (2025-08-07), the previous model in this line. A score is compared only with the same benchmark from the same source, at the same setting where both have it. Full comparison: prices, limits, features
Arena
| Arena | GPT-5.6 Terra | GPT-5 mini (2025-08-07) | Change | Rank | Date | Source |
|---|---|---|---|---|---|---|
TextBy category
| 1466 ±4 | not rated | 51 of 415 42,358 votes | Oct 13, 2026 | source | |
| Text: Coding | 1517 ±7 | not rated | 42 of 410 11,280 votes | Oct 13, 2026 | source | |
| WebDev | 1522 ±6 | not rated | 50 of 142 13,237 votes | Oct 13, 2026 | source | |
| Vision | 1268 ±7 | not rated | 38 of 165 11,020 votes | Oct 9, 2026 | source | |
| Document | 1477 ±8 | not rated | 14 of 44 5,787 votes | Sep 13, 2026 | source | |
| Agent | 0.004 ±0.013 | not rated | 30 of 54 24,138 sessions | Oct 14, 2026 | source |
Rated as gpt-5.6-terra-xhigh (xhigh effort). Text, WebDev, Vision and Document ratings come from people voting between two anonymous answers; Text, Vision and Document are style-controlled, as on arena.ai. Agent is Arena's separate score for real agent sessions, on its own scale. Data: Arena (arena.ai), CC BY 4.0.
Epoch AI
| Benchmark | GPT-5.6 Terra | GPT-5 mini (2025-08-07) | Change | Setting | Run | Source |
|---|---|---|---|---|---|---|
| FrontierMath Tier 4 | 70.7% | 12.2% | +58.5 pts | max effort (vs high effort) | Jul 9, 2026 | source |
| FrontierMath Tiers 1-3 | 86.0% | 46.7% | +39.3 pts | max effort (vs high effort) | Jul 9, 2026 | source |
GPQA DiamondOther settings
| 93.3% | 75.0% | +18.3 pts | max effort (vs high effort) | Jul 9, 2026 | source |
OTIS Mock AIME 2024-2025Other settings
| 99.7% | 86.7% | +13.0 pts | max effort (vs high effort) | Jul 9, 2026 | source |
| SimpleQA Verified | 43.2% | 21.6% | +21.6 pts | max effort (vs high effort) | Aug 10, 2026 | source |
Run independently by Epoch AI. Data: Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.
On cloud platforms
All platform dates| Platform | Platform ID | State | Shutdown | Time left | Replacement | Source |
|---|---|---|---|---|---|---|
| Amazon Bedrock | openai.gpt-5.6-terra | Active | not before Jul 13, 2027 | — | source | |
| Microsoft Foundryversion 2026-07-09 | gpt-5.6-terra | Active | Jan 11, 2028 | 453 days | — | source |
Read daily from each platform's own pages. The shutdown date and countdown on this page use OpenAI's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.
Features
Compare models| Feature | Value | Since | Source |
|---|---|---|---|
| Structured outputsThe model can be held to a JSON schema you supply, so every reply parses without retries or cleanup. | Supported | in place when tracking began (October 7, 2026) | source |
| Function callingAlso called tool use. You describe functions; the model replies with a function name and arguments for your code to run, then uses the result. | Supported | in place when tracking began (October 7, 2026) | source |
| Prompt cachingA prompt prefix you send again and again (system prompt, documents, tools) is cached, so later requests cost less and start faster. | Supported | in place when tracking began (October 7, 2026) | source |
| Batch APISend many requests as one job that runs in the background, usually finished within 24 hours, at a lower price than live requests. | Supported | in place when tracking began (October 7, 2026) | source |
| Image inputImages such as screenshots, photos and charts can go in the prompt for the model to read. | Supported | in place when tracking began (October 7, 2026) | source |
| Reasoning / thinkingThe model can work through a problem step by step before it answers: usually better answers to hard questions, at the cost of more tokens and time. | Supported | in place when tracking began (October 7, 2026) | source |
| Fine-tuningYou can train your own version of the model on your examples through the company's API, then call it like any other model. | Not supported | in place when tracking began (October 7, 2026) | source |
| Built-in web searchThe company's API can search the web for the model during a request and cite its sources; you don't need a search service of your own. | Supported | in place when tracking began (October 7, 2026) | source |
| Context windowThe most the model can work with in one request, in tokens: your prompt, conversation history and files. A token is about three-quarters of an English word. | 1,050,000 tokens | in place when tracking began (October 7, 2026) | source |
| Max output tokensThe longest reply the model can write in one response, in tokens. A token is about three-quarters of an English word. | 128,000 tokens | in place when tracking began (October 7, 2026) | source |
Not published by OpenAI: PDF input, temperature parameter, top_p parameter, logprobs.
Price history
USD per 1M tokens, standard tierWe started recording this model's prices on Oct 1, 2026. The history grows with each daily check.
Show as a table
| From | Type | Price |
|---|---|---|
| Oct 1, 2026 | Input | $2.00 |
| Oct 1, 2026 | Output | $12.00 |
Prices
USD per 1M tokens, every type and band, by tier| Type | Band | Price $/1M | In effect |
|---|---|---|---|
| Standard | |||
| input | long context | $4.00 | |
| input | short context | $2.00 | |
| cached input | long context | $0.40 | |
| cached input | short context | $0.20 | |
| cache write | long context | $5.00 | |
| cache write | short context | $2.50 | |
| output | long context | $18.00 | |
| output | short context | $12.00 | |
| Batch | |||
| input | long context | $2.00 | |
| input | short context | $1.00 | |
| cached input | long context | $0.20 | |
| cached input | short context | $0.10 | |
| cache write | long context | $2.50 | |
| cache write | short context | $1.25 | |
| output | long context | $9.00 | |
| output | short context | $6.00 | |
| Flex | |||
| input | long context | $2.00 | |
| input | short context | $1.00 | |
| cached input | long context | $0.20 | |
| cached input | short context | $0.10 | |
| cache write | long context | $2.50 | |
| cache write | short context | $1.25 | |
| output | long context | $9.00 | |
| output | short context | $6.00 | |
| Fast | |||
| input | long context | $8.00 | |
| input | short context | $4.00 | |
| cached input | long context | $0.80 | |
| cached input | short context | $0.40 | |
| cache write | long context | $10.00 | |
| cache write | short context | $5.00 | |
| output | long context | $36.00 | |
| output | short context | $24.00 | |
Changelog
Changes we detected on OpenAI's pagesNo changes recorded yet.
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Last checked · Sources: OpenAI deprecations, OpenAI pricing, OpenAI models