GPT-5.6

Timeline

Not on the active radar. A release or rename under this name is not confirmed.

evidence link

1. 2026-11-14T14:17:13.326Z · Confirmed use · OpenAI · official articles · Chatham scales its capital markets expertise with OpenAI
2. 2026-11-14T12:55:34.251Z · Confirmed use · OpenAI · official articles · Pollo AI turns creative ideas into campaigns with OpenAI
3. 2026-11-14T12:55:34.251Z · Evidence links · OpenAI · official articles
4. 2026-11-14T12:35:21.037Z · Evidence links · OpenAI · official articles
5. 2026-11-14T06:58:53.887Z · Alex's posts · model family · OpenAI · official articles
   Excerpt

   We will progressively expand access to all Daybreak Red customers soon, and are also making GPT‑5.6 Cyber available to all Daybreak Red customers

6. 2026-11-13T21:13:01.170Z · Confirmed use · OpenAI · official articles · Introducing the ChatGPT for small business program
   Excerpt

   ChatGPT Work is also powered by GPT‑5.6, our most advanced model available to businesses of any size and all subscription plans

7. 2026-11-13T18:47:23.489Z · Alex's posts · model family · GitHub search · OpenAI · pulls · yc-software/qm · @ReganBell
   Excerpt

   sandbox and app provider, real model turns on GPT-5.6 Terra), driven through the portal in a headless Chromium at commit `31044aea1`. No apps domain is

8. 2026-11-12T18:45:20.401Z · Catalogue listing · GitHub · openai/openai-node · code
   Excerpt

   - type: string description: | Controls which reasoning items are rendered back to the model on later turns. If omitted or set to `auto`, the model determines the context mode. The `gpt-5.6` model family defaults to `all_turns`; earlier models default to `current_turn`. When returned on a response, this is the effective reasoning context mode used for the response. enum: - auto - current_turn - all_turns - type: 'null' generate_summary: anyOf: - type: string deprecated: true description: | **Deprecated:** use `summary` instead. A summary of the reasoning performed by the model. This can be useful for debugging and understandi

   This code reference does not establish a working model identifier.

9. 2026-11-11T09:22:02.252Z · Confirmed use · OpenAI · official articles · Cogent and OpenAI build cyber defense factories for enterprises
   Excerpt

   The company’s AI agents combine GPT‑6.1 Sol and GPT‑5.6 with its enterprise context and controls to handle investigation through verified remediation

10. 2026-11-10T20:40:39.415Z · Catalogue listing · GitHub · openai/openai-python · code
    Excerpt

    - type: string description: | Controls which reasoning items are rendered back to the model on later turns. If omitted or set to `auto`, the model determines the context mode. The `gpt-5.6` model family defaults to `all_turns`; earlier models default to `current_turn`. When returned on a response, this is the effective reasoning context mode used for the response. enum: - auto - current_turn - all_turns - type: 'null' generate_summary: anyOf: - type: string deprecated: true description: | **Deprecated:** use `summary` instead. A summary of the reasoning performed by the model. This can be useful for debugging and understandi

    This code reference does not establish a working model identifier.

11. 2026-11-10T20:40:17.231Z · Catalogue listing · GitHub · openai/openai-agents-python · code
    Excerpt

    -5.4", "gpt-5.4-2026-03-05", "gpt-5.4-pro", "gpt-5.4-pro-2026-03-05", "gpt-5.5", "gpt-5.5-2026-04-23", "gpt-5.5-pro", "gpt-5.5-pro-2026-04-23", "gpt-5.6", "gpt-5.6-sol", "gpt-5.6-terra", "gpt-5.6-luna", "gpt-4.1", "gpt-4.1-2025-04-14", "gpt-4.1-mini", "gpt-4.1-mini-2025-04-14", "gpt-4.1-nano", "gpt-4.1-nano-2025-04-14", ), 1_047_576, ), **_model_context_windows( ( "gpt-5", "gpt-5-2025-08-07", "gpt-5-codex", "gpt-5-mini", "gpt-5-mini-2025-08-07", "gpt-5-nano", "gpt-5-nano-2025-08-07", "gpt-5-pro", "gpt-5-pro-2025-10-06", "gpt-5

12. 2026-11-10T18:00:44.369Z · Catalogue listing · GitHub · openai/codex · code
    Excerpt

    _body_json(serde_json::json!({ "threads": [ {"thread_id": "thread-a", "turns": [{ "turn_id": "turn-a", "model": "gpt-5.6", "estimated_usage_usd_micros": 1250001, "settled_response_ids": ["resp-a", "resp-b"] }]}, {"thread_id": "thread-b", "turns": [ {"turn_id": "turn-b", "estimated_usage_usd_micros": null, "settled_response_id

    This code reference does not establish a working model identifier.

13. 2026-11-10T18:00:44.369Z · Catalogue listing · GitHub · openai/codex · code
    Excerpt

    "GPT-6 Luna", /*priority*/ 4, ), bedrock_model( bundled_openai_model(GPT_5_6_SOL_OPENAI_MODEL_ID), AMAZON_BEDROCK_GPT_5_6_SOL_MODEL_ID, "GPT-5.6 Sol", /*priority*/ 5, ), bedrock_model( bundled_openai_model(GPT_5_6_TERRA_OPENAI_MODEL_ID), AMAZON_BEDROCK_GPT_5_6_TERRA_MODEL_ID, "GPT-5.6 Terra", /*priority*/ 6, ), bedrock_model( bundled_openai_model(GPT_5_6_LUNA_OPENAI_MODEL_ID), AMAZON_BEDROCK_GPT_5_6_LUNA_MODEL_ID, "GPT-5.6 Luna", /*priority*/ 7, ), gpt_5_bedrock_model( GPT_5_5_OPENAI_MODEL_ID, AMAZON_BEDROCK_GPT_5_5_MODEL_ID,

    This code reference does not establish a working model identifier.

14. 2026-11-10T17:59:50.472Z · Catalogue listing · GitHub · openai/openai-agents-python · code
    Excerpt

    # It's also fine to pass a GPT-5 model name explicitly: model="gpt-5.6-sol", model_settings=ModelSettings(reasoning=Reasoning(effort="high"), verbosity="low"), ) ``` レイテンシーを抑えるには、GPT-5 モデルで `reasoning.effort="none"` を使用することを推奨します。 GPT-5.6 は、既存の `reasoning` 設定を通じて、推論モード、会話ターン間で引き継がれる推論コンテキスト、`"max"` 労力レベルもサポートします。これらの制御は Responses API 経路で利用できます。 ```python from openai.types.shared import Reasoning from agents import Agent, ModelSettings agent = Agent( name="Deep research agent", model="gpt-5.6-sol", model_settings=ModelSettings( reasoning=Reasoning( mode="pro", effort="max", context="all_turns", ), ), ) ``` `reasoning.mode` と `reasoning.context` は Responses 専用の設定です。Chat Completions では `reasoning.effort` のみが使用され、サポートされる労力レベルはモデルと API サーフェスによって異なります。GPT-5.6 の `"max"` 労力には Responses API を使用してください。Chat

    This code reference does not establish a working model identifier.

15. 2026-11-10T17:58:16.002Z · Catalogue listing · GitHub · openai/openai-python · code
    Excerpt

    nfigured just like the `OpenAI` instantiation counterpart openai.base_url = "https://..." openai.default_headers = {"x-foo": "true"} # all API calls work in the exact same fashion as well stream = openai.chat.completions.create( model="gpt-5.6", messages=[ { "role": "user", "content": "How do I output all files in a directory using Python?", }, ], stream=True, ) for chunk in stream: print(chunk.choices[0].delta.content or "", end="", flush=True) print()

    This code reference does not establish a working model identifier.

16. 2026-11-10T17:58:10.980Z · Catalogue listing · GitHub · openai/openai-agents-js · code
    Excerpt

    withoutPinnedDate = normalized.replace(/-\d{4}-\d{2}-\d{2}$/u, ''); return [...new Set([normalized, withoutPinnedDate])]; } const SANDBOX_CONTEXT_WINDOWS_1M = new Set([ 'gpt-6-astra', 'gpt-6-sol', 'gpt-6-luna', 'gpt-6.1-sol', 'gpt-5.6', 'gpt-5.6-sol', 'gpt-5.6-terra', 'gpt-5.6-luna', 'gpt-5.4', 'gpt-5.4-2026-03-05', 'gpt-5.4-pro', 'gpt-5.4-pro-2026-03-05', 'gpt-4.1', 'gpt-4.1-2025-04-14', 'gpt-4.1-mini', 'gpt-4.1-mini-2025-04-14', 'gpt-4.1-nano', 'gpt-4.1-nano-2025-04-14', ]); const SANDBOX_CONTEXT_WINDOWS_400K = new Set([ 'gpt-5', 'gpt-5-codex', 'gpt-5-mini', 'gpt-5-nano', 'gpt-5-pro', 'gpt-5.1', 'gpt-5.1-codex', 'gpt-5.1-codex-max', 'gpt-5.1-codex-mini', 'gpt-5.2', 'gpt-5.2-codex', 'gpt-5.2-codex-cyber', 'gpt-5.2-pro', 'gpt-5.3-codex', 'gpt-5.3-codex-spark', 'gpt-5.4-mini', 'gpt-5.4-nano', ]); const

17. 2026-10-07T19:47:46.396Z · Evidence links · OpenAI · API changelog
    Excerpt

    Prompt Cache Diagnostics is now generally available in the Responses API for GPT-5.6 and later supported models

18. 2026-07-30T17:51:58.749Z · Alex's posts · Alex Getman
    Excerpt

    ⚡️ OpenAI just slashed GPT 5.6 prices Luna is now 80% cheaper, while Terra dropped 20%. The cuts also apply to subscriptions, with both models now using less of your quota. Luna is now cheaper than DeepSeek V4 Pro on input. One million tokens cost $0.20 vs $0.435.

19. 2026-07-08T07:44:34.000Z · Alex's posts · Alex Getman
    Excerpt

    ⚡ GPT-5.6 DROPS THURSDAY

20. 2026-06-26T19:45:06.000Z · Alex's posts · Alex Getman
    Excerpt

    The most powerful AI models are starting to look less like products and more like passes into a closed club. Publicly, we hear: “safety,” “staged rollout,” “available soon.” In practice: some people get GPT-5.6 now, while everyone else waits for permission. That is a dangerous precedent. Because the real divide won’t be between people who use AI and people who don’t. It will be between those who got the best AI in time — and those who got it after the game had already started.

21. 2026-06-26T19:21:53.000Z · Alex's posts · Alex Getman
    Excerpt

    Feedback on GPT-5.6 from the founder of OpenCode • Dax says he usually doesn’t hype new models. But GPT-5.6 has noticeably changed how his team works. • The key point: he doesn’t think the model writes good code on its own. What he likes is not the out-of-the-box result, but the process of getting to good code with it. • According to him, GPT-5.6 understands the task better and loses fewer details along the way. It also catches things the developer may have forgotten. • The problems are still there: the model can still be overly defensive and write unnecessary code. Sometimes they do another pass afterward and delete half of what it wrote. • The most telling fact: his team’s token usage is

22. 2026-06-25T22:41:38.000Z · Alex's posts · Alex Getman
    Excerpt

    GPT-5.6 delayed at Trump’s request? The Trump administration asked OpenAI to release its new model gradually over security concerns, The Information reports.

Alex's posts 1