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GPT-6 Astra benchmarks, pricing and specs

GPT-6 Astra is an OpenAI model released on September 3, 2026 that takes text and image input and produces text. It costs $10 per 1M input tokens and $50 per 1M output tokens and accepts up to 1,050,000 tokens of context. It scores 1475 Elo on Arena Text, #18 of 39 current models (Arena, measured October 8, 2026).

Per 1M input tokens
$10
Per 1M output tokens
$50
Context window
1.05M
Arena Text
1475 Elo · #18/39

Data verified October 12, 2026 · Dataset 2026-10-12

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Key facts

Provider
OpenAI
Model family
GPT-6
Release date
September 3, 2026
Status
Current
Access
API only
API model id
Not reported
Context window
1,050,000 tokens
Max output
128,000 tokens
Input
text, image
Output
text
Task families
text, multimodal
Declared capabilities
reasoning

GPT-6 Astra pricing

It is tied for the most expensive of 37 current text models priced per 1M input tokens.

UnitPrice (USD)TierAppliesSource
1M input tokens$10standardCurrent
1M output tokens$50standardCurrent
1M input tokens$1cachedCurrent

Independent benchmark results

Scores come from independent evaluators that ran the model themselves, pinned to a dated snapshot. Rank is among current models in the same snapshot. OpenAI's own launch figures are listed under strengths with the publisher named, because they are not measured the same way.

BenchmarkScoreRankMeasuredSource
Arena Text1475 Elo#18 of 39October 8, 2026Arena · 2026-10-12
GPQA Diamond95.8%#1 of 37October 12, 2026Epoch AI · 2026-10-12
FrontierMath Tiers 1-3 (v2)93.7%#1 of 37October 12, 2026Epoch AI · 2026-10-12
SimpleQA Verified75.6%#1 of 34October 12, 2026Epoch AI · 2026-10-12

Strengths, cautions and best uses

Strengths

  • OpenAI positions GPT-6 Astra as its frontier model for reasoning, agentic work, and computer use, with a 1,050,000-token context window and 128,000-token maximum output
  • OpenAI reports the strongest published deep-context retention of any frontier model on MRCR v2 (8 needles): 100% up to 512K tokens and 96.3% in the 512K-1M band
  • OpenAI reports saturation-level scores on FrontierMath Tier 4 (97.6%) and, under its own provider adapter harness, ARC-AGI-3 (99.9%)

Cautions

  • Long-context billing is a cliff, not a taper: a request over the long-context threshold is rebilled in full at $20 per million input and $75 per million output, so a prompt that crosses it costs roughly double
  • GPT-6 Astra is the first publicly released model OpenAI classifies as crossing the Critical cybersecurity threshold under its own Preparedness Framework, which carries additional deployment safeguards
  • Vendor-reported benchmark figures come from OpenAI’s own launch material and its own harness; they are not independently reproduced here

Best for

  • Frontier reasoning and agentic evaluations where deep-context retrieval accuracy is the binding constraint
  • Workloads that can be kept under the long-context threshold, where the effective rate stays at $10 / $50

Alternatives to GPT-6 Astra

The closest current textmodels by price. The cheapest model that scores as well or better is listed first; failing that, the cheapest one within 3% of the benchmark's scale.

Compare GPT-6 Astra with

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GPT-6 Astra FAQ

How much does GPT-6 Astra cost?

GPT-6 Astra costs $10 per 1M input tokens and $50 per 1M output tokens at the standard tier. It is tied for the most expensive of 37 current text models priced per 1M input tokens. Source: OpenAI, verified October 11, 2026.

What is the context window of GPT-6 Astra?

GPT-6 Astra accepts up to 1,050,000 tokens of context. It can return up to 128,000 tokens in one response. That ranks #1 of 44 current text models by context length.

How does GPT-6 Astra score on independent benchmarks?

GPT-6 Astra scores 1475 Elo on Arena Text, #18 of 39 current models (Arena, measured October 8, 2026), 95.8% on GPQA Diamond, #1 of 37 current models (Epoch AI, measured October 12, 2026) and 93.7% on FrontierMath Tiers 1-3 (v2), #1 of 37 current models (Epoch AI, measured October 12, 2026). These are independent evaluations, not OpenAI's own launch figures.

Is GPT-6 Astra open source or API only?

GPT-6 Astra is available through OpenAI's API only; its weights are not published.

What are the best alternatives to GPT-6 Astra?

The closest current alternatives by price and measured performance are DeepSeek-V4.1-Flash (97% cheaper per 1M input tokens, $0.30 vs $10), Claude Fable 5 (same price per 1M input tokens, $10), Claude Fable 5.1 (same price per 1M input tokens, $10) and GPT-5.5 (50% cheaper per 1M input tokens, $5 vs $10).

Sources

Cite this page

Van Data Team. "GPT-6 Astra Benchmarks, Pricing and Specs." AI Model Benchmark Dataset 2026-10-12. https://vandatateam.com/ai-model-benchmarks/gpt-6-astra

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