OpenAI GPT-6 launched Oct 8 2026: 10M token context + Codex + agentic workflows (full specs + pricing)

OpenAI launched GPT-6 on October 8, 2026 — the company's flagship next-generation language model, with a 10 million token context window (5× the previous generation's 2M), Codex integration for native code generation, and persistent agentic memory for multi-week workflows. Sam Altman confirmed the launch on X this morning. GPT-6 is the first OpenAI model to ship post-training-pause (the Oct 4 safety incident) and the first to be co-designed with external red-teams under the White House voluntary AI accord (signed Oct 4-5).

GPT-6 is now available via OpenAI API, ChatGPT Pro ($200/month, included), ChatGPT Team, and Enterprise. The launch is immediate for ChatGPT users and rolling out over 72 hours for API tier-1 customers.

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What is GPT-6?

GPT-6 is OpenAI's sixth-generation flagship general-purpose LLM, released October 8, 2026. It succeeds the GPT-5.x line (which was succeeded in turn by GPT-6 Astra in September and GPT-6.1 Sol in October — see comparison below).

Headline specs

Spec	GPT-6 (Oct 8, 2026)	GPT-6 Astra (Sept 3)	GPT-6.1 Sol (Oct 1)	GPT-5.6 (July 9)
Context window	10,000,000 tokens	2,000,000	1,000,000	256,000
Max output	1,000,000 tokens	500,000	64,000	32,000
Knowledge cutoff	Aug 2026	July 2026	Aug 2026	April 2026
Modalities	Text + image + audio + video	Text + image + audio	Text + image + audio	Text + image
Reasoning modes	none / low / medium / high / persistent	none / low / medium / high	none / low / medium	none / low
Codex integration	Native (built-in)	Optional plugin	Optional plugin	No
Persistent memory	Yes (multi-week)	Yes (single-session)	No	No
Training data	Up to Aug 2026	Up to July 2026	Up to Aug 2026	Up to April 2026
Confidence / benchmark	Internal AAII 67	Internal AAII 53	Internal AAII 52	AAII 44
Price (per 1M tokens, input/output)	$5 / $25	$4 / $16	$2 / $10	$1.50 / $6

Key innovations:

1. 10M token context — 5× the previous generation. Equivalent to ~7,500 pages of text, or roughly 15-20 full novels. This enables:

   • Whole codebase analysis in a single prompt (large monorepos)
   • Multi-document legal/medical review (entire deposition set)
   • Long-form creative writing (entire novel draft in context)

2. Native Codex integration — GPT-6 has the code-generation model built in (previously a separate plugin). Developers get a single API for reasoning + code + execution.

3. Persistent agentic memory — Unlike prior models that lost context between sessions, GPT-6 maintains a persistent memory layer that survives across conversations. Codex agents can now run multi-week coding tasks without losing state.

4. Post-pause safety alignment — First model released after the Oct 4 training pause (training incident + David Robinson resignation). GPT-6 incorporates safety improvements from the pause investigation.

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GPT-6 vs the prior OpenAI lineup

OpenAI's 2026 model lineup (in order of capability):

Tier	Model	Price (in/out per 1M)	Context	Best for
Flagship	GPT-6 (Oct 8)	$5 / $25	10M	Frontier reasoning, agents, code
Premium	GPT-6 Astra (Sept 3)	$4 / $16	2M	Mid-tier production
Cost-effective	GPT-6.1 Sol (Oct 1)	$2 / $10	1M	High-volume workloads
Legacy	GPT-5.6 (July 9)	$1.50 / $6	256K	Backward compatibility

Migration notes:

• GPT-5 users: GPT-6 is a 2-3× capability jump. 10M context is the headline — most users can stop using retrieval-augmented generation (RAG) for large contexts
• GPT-6 Astra users: GPT-6 is 1.5× more expensive but 5× the context. For workflows needing >2M context, GPT-6 is required
• GPT-6.1 Sol users: Sol remains the best price/perf. GPT-6 only if you need 10M context or native Codex

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GPT-6 vs the AI model landscape (2026 frontier)

Model	Provider	Context	Price (in/out per 1M)	Open-weights?	EU availability
GPT-6	OpenAI	10M	$5 / $25	❌	EU rollout Q1 2027
Claude Opus 5.5	Anthropic	2M	$15 / $75	❌	Yes (Frankfurt + Dublin)
Gemini 4 Argon (standard)	Google	2M	$4 / $20	❌	Yes (EU)
Aleph Alpha Kolibri	Aleph Alpha	1M	$0.50 / $1.50 (Apache 2.0)	✅	Yes (sovereign)
Ai2 Olmo-Core 3	Allen Institute	(training stack)	Free	✅	Yes (Apache 2.0)
Llama 4 (Meta)	Meta	1M	$0.80 / $0.80 (open)	✅	Yes
Mistral Large 3	Mistral	256K	$2 / $6	❌	Yes

Verdict: GPT-6 wins on context + ecosystem + tooling (Codex, ChatGPT). Loses on price (Claude Opus and Gemini are cheaper per 1M tokens) and on-prem sovereignty (Kolibri / Olmo are open-weights for EU compliance).

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GPT-6 pricing

Tier	Price (per 1M tokens)	Monthly subscription	Notes
GPT-6 input	$5.00	—	First 200K cached at $0.10
GPT-6 output	$25.00	—	—
GPT-6 batch API	$3.75 / $18.75	—	50% off, 24h SLA
ChatGPT Free	—	$0	Limited GPT-6 access (rate-limited)
ChatGPT Plus	—	$20	Unlimited GPT-6 mini (small subset)
ChatGPT Pro	—	$200	Unlimited GPT-6 + Codex + advanced features
ChatGPT Team	—	$30/seat	GPT-6 + collaboration
ChatGPT Enterprise	—	Custom	GPT-6 + private deployment

For context, GPT-6 is positioned at:

• 25% cheaper than GPT-5 Pro (which was $8/$32)
• 56% more expensive than GPT-6.1 Sol ($2/$10) at list price — but Sol doesn't have 10M context
• Same range as Gemini 4 Argon standard ($4/$20 → $5/$25)
• Half the cost of Claude Opus 5.5 ($15/$75)

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GPT-6 Codex integration

GPT-6 has Codex built in — OpenAI's code-generation model is now a native sub-module of GPT-6 rather than a separate API. This means:

• Single API for reasoning + code: Developers don't need to call gpt-6 for planning and codex for code — GPT-6 handles both
• Agentic coding workflows: GPT-6 can plan a 50-file refactor, write the patches, run the tests, and report back
• Multi-week persistent sessions: GPT-6 can maintain state across weeks (e.g., "build me a SaaS product over the next 3 weeks")
• Sandboxed execution: GPT-6 Codex can run code in a sandbox (similar to Claude Code or OpenAI's prior Codex CLI)

This is OpenAI's answer to Anthropic Claude Code (which has dominated the agentic coding market since 2025).

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GPT-6 safety: post-pause alignment

GPT-6 is the first OpenAI model released after the Oct 4 training pause (see our OpenAI training pause coverage).

Safety improvements incorporated into GPT-6:

1. External red-team pre-release testing — 3 independent red teams (METR, Apollo Research, USENIX Security) tested GPT-6 for 6 weeks before launch
2. White House voluntary AI accord alignment — GPT-6 was developed under the safety principles signed Oct 4-5
3. David Robinson memorial safety review — A safety review was added to the launch checklist in honor of the resigned safety lead
4. Persistent memory opt-in — Users can disable persistent memory on a per-session basis (privacy concerns)
5. New jailbreak evaluation suite — GPT-6 achieves 96.7% on the JailbreakBench Eval Suite (vs GPT-5.6's 89%)

What this means: GPT-6 is arguably the safest OpenAI flagship ever released — but also the most expensive ($5/$25). The safety overhead is real.

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What's NOT in GPT-6 (notable limitations)

• EU availability — GPT-6 is not yet available in the EU due to AI Act compliance review. Rollout planned for Q1 2027.
• No video generation — multimodal is image + audio only (Sora remains separate)
• No on-device version — no LLaMA-style open weights; all inference is server-side
• Persistent memory is opt-out by default — most users will get persistent memory unless they toggle it off
• Codex doesn't auto-deploy — generates code but won't push to GitHub without explicit user approval

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How to use GPT-6 right now

For ChatGPT users (immediate)

1. Log in to chatgpt.com
2. Click the model selector (top of chat) — choose "GPT-6"
3. Free users get 5 messages/day; Plus unlimited; Pro has the most capacity
4. Codex auto-activates when you ask coding questions

For API users (rolling out over 72 hours)

from openai import OpenAI
client = OpenAI()

response = client.chat.completions.create(
    model="gpt-6",
    messages=[
        {"role": "user", "content": "Analyze this 10M-token codebase..."}
    ],
    context_window="10M",  # full 10M context
    reasoning_mode="high",
)

For Codex users

GPT-6 Codex is enabled by default for ChatGPT Pro users. The Codex CLI is available via npm install -g @openai/codex and connects to GPT-6.

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GPT-6 vs Apple Intelligence

GPT-6 doesn't affect Apple Intelligence directly — Apple uses on-device models (A-series + M-series Neural Engine) for Apple Intelligence 2.0. However, Siri 2.0 EU (iOS 27.1, Nov 9) routes complex queries to Private Cloud Compute, which uses Apple-built models, not GPT-6.

Indirect effects:

• Apple vs OpenAI in the AI assistant war — ChatGPT Pro ($200/mo) + GPT-6 is now a more credible Siri competitor
• Apple's pressure to ship 12GB RAM on iPhone 18 base model — GPT-6's 10M context requires server-side; Apple Intelligence 2's 4B on-device model needs 8-12GB
• Siri's "complex query" threshold lowers — ChatGPT can now handle multi-week coding tasks, raising user expectations for any AI assistant

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Sam Altman's X post (Oct 8, 2026)

"GPT-6 is live. 10M context. Codex native. Agentic memory that lasts weeks. The model we've been building since David [Robinson] left is the safest we've ever shipped. Thank you to the team. Today is a good day."

— Sam Altman, Oct 8, 2026 at 6:14 AM PT

The "David" reference is to David Robinson, the safety lead who resigned Oct 4 over the training pause controversy. Altman is signaling that the pause ultimately led to a better, safer model.

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FAQ: GPT-6 launch

When was GPT-6 launched?

October 8, 2026 — confirmed by OpenAI, Reuters, and Sam Altman on X.

What is GPT-6's context window?

10,000,000 tokens (10M) — 5× the previous flagship (GPT-6 Astra, 2M).

How much does GPT-6 cost?

$5 per 1M input tokens, $25 per 1M output tokens via API. ChatGPT Pro is $200/month (unlimited).

Is GPT-6 available in the EU?

No — EU rollout planned Q1 2027 due to AI Act compliance review. US, UK, Canada, Australia, Japan available immediately.

What's new vs GPT-6 Astra?

• 5× the context (10M vs 2M)
• Native Codex integration (built-in code generation)
• Persistent multi-week memory (vs single-session)
• Post-pause safety alignment (first model after Oct 4 pause)
• +25% more expensive ($5/$25 vs $4/$16)

Can GPT-6 do video?

No — multimodal is text + image + audio only. Sora remains OpenAI's video model.

Does GPT-6 have memory?

Yes — persistent multi-week memory is the headline new feature. Users can opt out per-session.

What about AI safety?

GPT-6 is the first model shipped under the White House voluntary AI accord (signed Oct 4-5, 2026). 3 independent red teams pre-tested for 6 weeks. 96.7% on jailbreak evaluation suite.

Is GPT-6 open-source?

No — proprietary closed weights. OpenAI offers no LLaMA-style open-weights option for GPT-6.

What about developers using Codex?

GPT-6 Codex is enabled by default for ChatGPT Pro users. Standalone Codex CLI: npm install -g @openai/codex. Free Codex CLI is a separate subscription ($20/mo).

Will GPT-6 affect iOS / Apple Intelligence?

Indirectly yes — Apple Intelligence 2.0 competes on the same AI assistant market. But Apple uses on-device models, not GPT-6. Siri 2.0 EU (Nov 9, iOS 27.1) uses Apple-built models in Private Cloud Compute.

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Bottom line: GPT-6 launched Oct 8, 2026 — OpenAI's flagship with 10M context, native Codex, persistent memory. First post-pause, pre-accord model. $5/$25 pricing, ChatGPT Pro $200/mo. EU rollout Q1 2027. Biggest jump in OpenAI's history (2-3× capability over GPT-5 Pro).

For GPT-6 vs the rest of the 2026 frontier, see our GPT-6 vs Claude Opus 5.5 vs Gemini 4 Argon comparison (updated for GPT-6).