Where is the GPT-6 Astra documentation?

The GPT-6 Astra documentation on OpenRouter includes the GPT-6 Migration Guide cookbook. The quickstart covers API keys and your first request, and the API reference lists every parameter.

How much does GPT-6 Astra cost?

GPT-6 Astra costs $10.00/M input tokens and $50.00/M output tokens, with separate rates for Cache Read at $1.00/M tokens and Cache Write at $12.50/M tokens.

What is the context length of GPT-6 Astra?

GPT-6 Astra has a 1,050,000 token context window. It supports up to 128,000 completion tokens.

Does GPT-6 Astra support tool calling and structured outputs?

Yes. GPT-6 Astra accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

Can I disable prompt caching for GPT-6 Astra?

Yes. OpenAI caches prompts of 1024 tokens or more automatically, and GPT-6 Astra bills a cache write on each cached prompt whether or not the cached prefix is read again. To turn caching off for a request, set prompt_cache_options.mode to "explicit" at the request root and do not mark any content block with prompt_cache_breakpoint. Explicit mode disables OpenAI-managed breakpoints, so a request with none of your own has no cacheable prefix and is billed at the plain input rate. See the prompt caching guide.

What inputs and outputs does GPT-6 Astra support?

GPT-6 Astra accepts files such as PDFs, images, and text as input and returns text.

Which providers serve GPT-6 Astra?

GPT-6 Astra is served by 3 providers on OpenRouter: OpenAI, Amazon Bedrock, and Azure. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

When was GPT-6 Astra released?

GPT-6 Astra was released on September 4, 2026.

OpenAI: GPT-6 Astra

openai/gpt-6-astra

Compare

GPT-6 Astra is OpenAI's flagship model for demanding end-to-end work. It is suited for advanced analysis, software engineering, deep research, scientific work, and document creation, with particular strengths in long-horizon agentic tasks that involve computer and browser use.

Modalities

In / out price

$10 / $50per 1M

Context

1.1M

Released

Sep 4, 2026

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick: Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

Latency / throughput


	$10.00	$50.00	$1.00	5.82s	105 tok/s	99.00%
	$10.00	$50.00	$1.00	4.20s	35 tok/s	99.49%
	$10.00	$50.00	$1.00	7.07s	39 tok/s	99.60%
Not used in Standard routing:Why these endpoints are not used
Flex	$5.00	$25.00	$0.50	2.79s	38 tok/s	100.00%
	$11.00	$55.00	$1.10	1.17s	27 tok/s	100.00%
	$11.00	$55.00	$1.10	11.23s	31 tok/s	99.56%
Fast	$20.00	$100.00	$2.00	5.00s	71 tok/s	100.00%
Ultrafast	$60.00	$300.00	$6.00	--	--	--

Input $10.00Output $50.00
105 tok/s99.00% uptime
Input $10.00Output $50.00
35 tok/s99.49% uptime
Input $10.00Output $50.00
39 tok/s99.60% uptime
Not used in Standard routing:Why these endpoints are not used
Input $5.00Output $25.00
Flex
38 tok/s100.00% uptime
Input $11.00Output $55.00
27 tok/s100.00% uptime
Input $11.00Output $55.00
31 tok/s99.56% uptime
Input $20.00Output $100.00
Fast
71 tok/s100.00% uptime
Input $60.00Output $300.00
Ultrafast
-- tok/s-- uptime

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Weighted average

Input

$2.859/M tokens

Output

$49.84/M tokens

GPT-6 Astra — Price history

Price history

No effective price data for this selection

		$2.20	$50.54	90.5%	36.5%
		$3.33	$50.15	79.6%	55.3%
		$3.74	$50.02	76.5%	1.5%
Not used in Standard routing:Why these endpoints are not used
	Flex	$1.40	$25.00	84.1%	3.1%
		$2.41	$59.30	95.1%	0.5%
	Fast	$3.53	$100.00	92.4%	3.1%
		$13.55	$55.00	0.0%	0.0%
	Ultrafast	$59.68	$300.00	22.2%	0.0%

Effective in $2.20Effective out $50.54
Token share
36.5%
Effective in $3.33Effective out $50.15
Token share
55.3%
Effective in $3.74Effective out $50.02
Token share
1.5%
Not used in Standard routing:Why these endpoints are not used
Effective in $1.40Effective out $25.00
FlexToken share
3.1%
Effective in $2.41Effective out $59.30
Token share
0.5%
Effective in $3.53Effective out $100.00
FastToken share
3.1%
Effective in $13.55Effective out $55.00
Token share
0.0%
Effective in $59.68Effective out $300.00
UltrafastToken share
0.0%

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Uptime (3d)

99.99%

Availability (3d)

99.43%

Availability over the last 3 days

Last 72 hours

Availability 99.43%

3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability

99.48%

Without Routing

97.16%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for OpenAI: GPT-6 Astra (Artificial Analysis and Vals AI)
Source	Benchmark	Score
Artificial Analysis	GPT-6 Astra (High) Intelligence Index	54.8
Artificial Analysis	GPT-6 Astra (High) Coding Index	77.1
Artificial Analysis	GPT-6 Astra (High) Agentic Index	48.2
Artificial Analysis	GPT-6 Astra (High) GPQA Diamond	94.9%
Artificial Analysis	GPT-6 Astra (High) HLE	53.1%
Artificial Analysis	GPT-6 Astra (High) AA-LCR	80.0%
Artificial Analysis	GPT-6 Astra (High) τ-Bench Banking	40.0%
Artificial Analysis	GPT-6 Astra (High) GDPval-AA	51.9%
Artificial Analysis	GPT-6 Astra (High) CritPt	28.9%
Artificial Analysis	GPT-6 Astra (High) SciCode	55.4%
Artificial Analysis	GPT-6 Astra (High) Terminal-Bench 4.0	54.0%
Artificial Analysis	GPT-6 Astra (High) Terminal-Bench 2.1	89.9%
Artificial Analysis	GPT-6 Astra (High) AA-Omniscience Accuracy	61.1%
Artificial Analysis	GPT-6 Astra (High) AA-Omniscience Non-Hallucination Rate	57.5%
Artificial Analysis	GPT-6 Astra (Medium) Intelligence Index	51.6
Artificial Analysis	GPT-6 Astra (Medium) Coding Index	76.7
Artificial Analysis	GPT-6 Astra (Medium) Agentic Index	46.0
Artificial Analysis	GPT-6 Astra (Medium) GPQA Diamond	93.9%
Artificial Analysis	GPT-6 Astra (Medium) HLE	52.7%
Artificial Analysis	GPT-6 Astra (Medium) AA-LCR	79.7%
Artificial Analysis	GPT-6 Astra (Medium) τ-Bench Banking	35.5%
Artificial Analysis	GPT-6 Astra (Medium) GDPval-AA	50.1%
Artificial Analysis	GPT-6 Astra (Medium) CritPt	29.1%
Artificial Analysis	GPT-6 Astra (Medium) SciCode	54.2%
Artificial Analysis	GPT-6 Astra (Medium) Terminal-Bench 4.0	49.5%
Artificial Analysis	GPT-6 Astra (Medium) Terminal-Bench 2.1	89.5%
Artificial Analysis	GPT-6 Astra (Medium) AA-Omniscience Accuracy	59.6%
Artificial Analysis	GPT-6 Astra (Medium) AA-Omniscience Non-Hallucination Rate	54.8%
Artificial Analysis	GPT-6 Astra (Max) Intelligence Index	56.9
Artificial Analysis	GPT-6 Astra (Max) Coding Index	76.9
Artificial Analysis	GPT-6 Astra (Max) Agentic Index	51.0
Artificial Analysis	GPT-6 Astra (Max) GPQA Diamond	96.1%
Artificial Analysis	GPT-6 Astra (Max) HLE	54.7%
Artificial Analysis	GPT-6 Astra (Max) AA-LCR	80.7%
Artificial Analysis	GPT-6 Astra (Max) τ-Bench Banking	41.4%
Artificial Analysis	GPT-6 Astra (Max) GDPval-AA	54.3%
Artificial Analysis	GPT-6 Astra (Max) CritPt	31.7%
Artificial Analysis	GPT-6 Astra (Max) SciCode	56.5%
Artificial Analysis	GPT-6 Astra (Max) Terminal-Bench 4.0	59.1%
Artificial Analysis	GPT-6 Astra (Max) Terminal-Bench 2.1	88.4%
Artificial Analysis	GPT-6 Astra (Max) AA-Omniscience Accuracy	61.6%
Artificial Analysis	GPT-6 Astra (Max) AA-Omniscience Non-Hallucination Rate	50.2%
Artificial Analysis	GPT-6 Astra (Low) Intelligence Index	43.3
Artificial Analysis	GPT-6 Astra (Low) Coding Index	75.7
Artificial Analysis	GPT-6 Astra (Low) Agentic Index	38.8
Artificial Analysis	GPT-6 Astra (Low) GPQA Diamond	93.1%
Artificial Analysis	GPT-6 Astra (Low) HLE	49.2%
Artificial Analysis	GPT-6 Astra (Low) AA-LCR	80.0%
Artificial Analysis	GPT-6 Astra (Low) τ-Bench Banking	32.0%
Artificial Analysis	GPT-6 Astra (Low) GDPval-AA	45.2%
Artificial Analysis	GPT-6 Astra (Low) CritPt	26.3%
Artificial Analysis	GPT-6 Astra (Low) SciCode	54.1%
Artificial Analysis	GPT-6 Astra (Low) Terminal-Bench 4.0	41.9%
Artificial Analysis	GPT-6 Astra (Low) Terminal-Bench 2.1	88.0%
Artificial Analysis	GPT-6 Astra (Low) AA-Omniscience Accuracy	58.6%
Artificial Analysis	GPT-6 Astra (Low) AA-Omniscience Non-Hallucination Rate	55.8%
Artificial Analysis	GPT-6 Astra (Xhigh) Intelligence Index	55.3
Artificial Analysis	GPT-6 Astra (Xhigh) Coding Index	75.9
Artificial Analysis	GPT-6 Astra (Xhigh) Agentic Index	50.2
Artificial Analysis	GPT-6 Astra (Xhigh) GPQA Diamond	96.3%
Artificial Analysis	GPT-6 Astra (Xhigh) HLE	54.6%
Artificial Analysis	GPT-6 Astra (Xhigh) AA-LCR	80.0%
Artificial Analysis	GPT-6 Astra (Xhigh) τ-Bench Banking	43.1%
Artificial Analysis	GPT-6 Astra (Xhigh) GDPval-AA	53.6%
Artificial Analysis	GPT-6 Astra (Xhigh) CritPt	31.4%
Artificial Analysis	GPT-6 Astra (Xhigh) SciCode	55.7%
Artificial Analysis	GPT-6 Astra (Xhigh) Terminal-Bench 4.0	59.6%
Artificial Analysis	GPT-6 Astra (Xhigh) Terminal-Bench 2.1	89.1%
Artificial Analysis	GPT-6 Astra (Xhigh) AA-Omniscience Accuracy	61.0%
Artificial Analysis	GPT-6 Astra (Xhigh) AA-Omniscience Non-Hallucination Rate	55.4%
Vals AI	GPT-6 Astra BioMysteryBench	79.3%
Vals AI	GPT-6 Astra Code Migration v1.1	80.6%
Vals AI	GPT-6 Astra CyberBench v1.1	41.1%
Vals AI	GPT-6 Astra EMB v1.1	72.7%
Vals AI	GPT-6 Astra Finance Agent v2.1	60.4%
Vals AI	GPT-6 Astra Vals Finance Index	55.6%
Vals AI	GPT-6 Astra Financial Coaching Bench	67.5%
Vals AI	GPT-6 Astra HLAB-Vals-1.1	7.1%
Vals AI	GPT-6 Astra Immigration	67.7%
Vals AI	GPT-6 Astra IOI	100.0%
Vals AI	GPT-6 Astra Vals Legal Index	68.4%
Vals AI	GPT-6 Astra Legal Research Bench	39.4%
Vals AI	GPT-6 Astra MedCode	48.5%
Vals AI	GPT-6 Astra MedScribe	87.9%
Vals AI	GPT-6 Astra MysteryMechanism	53.2%
Vals AI	GPT-6 Astra ProgramBench	5.5%
Vals AI	GPT-6 Astra ProofBench v1.1	99.0%
Vals AI	GPT-6 Astra Robo-bench	23.3%
Vals AI	GPT-6 Astra Vals RSI Index	27.1%
Vals AI	GPT-6 Astra SAGE v1	46.4%
Vals AI	GPT-6 Astra Vals Science Index	65.1%
Vals AI	GPT-6 Astra SRE Bench	56.9%
Vals AI	GPT-6 Astra SWE-bench Multimodal	43.3%
Vals AI	GPT-6 Astra Tax Agent Bench	20.7%
Vals AI	GPT-6 Astra Terminal-Bench 4.0	59.6%
Vals AI	GPT-6 Astra Terminal-Bench-Science	62.9%
Vals AI	GPT-6 Astra Vals Index	65.0%
Vals AI	GPT-6 Astra Vibe Code Bench 1-100	27.6%
Vals AI	GPT-6 Astra Vibe Code Bench v1.1	89.6%

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Codex

A coding agent that helps you build and ship with AI

495Btokens

Hermes Agent

Hermes Agent is an open-source, self-improving AI agent by Nous Research that runs persistently with memory across sessions, and builds reusable skills from experience. It comes with 40+ built-in tools, including web search, browser automation, and vision, plus scheduled automations and subagents.

54.2Btokens

Framer

Create a professional website with Framer’s no-code AI website builder. Design freely, manage CMS content, optimize SEO, collaborate, and publish fast.

49.7Btokens

There are many coding agents, but this one is yours.

31.2Btokens

Claude Code

Claude Code is Anthropic's agentic coding tool that reads your entire codebase, plans and executes changes across files, runs tests, and iterates on failures, all from natural language prompts.

30.1Btokens

Rest of OpenRouter

12.4B

Top 5 Apps

7.45B

OpenAI: GPT Astra versions

Not currently available through EU in-region routing. In-region routing docs

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GPT Astra Latest

This model always redirects to the latest model in the GPT Astra family.

Text1.1M context

OpenAI: GPT-6 Astra

Providers