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How smart is GPT-6 Astra?

150 SI-IQ · 90% interval 146–153
Rank 1 of 80 ranked models · Plausible rank range 1–3

GPT-6 Astra is a model from OpenAI, released on Sep 3, 2026. Its SI-IQ is 150 (90% interval 146–153), estimated from 8 benchmark results by 2 independent evaluators. Its strongest area is Reasoning and its weakest is Math.

Facts

Developer: OpenAI
Released: Sep 3, 2026
Access: API access
Benchmarks used: 8 results from 2 evaluators
API price: $10 input / $50 output per 1M tokens (developer's price list, Oct 18, 2026)
Context window: 922,000 tokens

Ability by area (SI-IQ, 90% interval)

Every benchmark result we used

Each score is one value exactly as the source published it: for Epoch AI the best of its run settings, for OpenRouter the median hosting provider (the developer's own hosting when it ran the test). “Implied SI-IQ” is the ability that this single result points to; the overall SI-IQ is their precision-weighted average.

Benchmark	Area	Score	Implied SI-IQ	Evaluated by	As listed by the source	Retrieved	Source
Chess Puzzles	Reasoning	74.0%	149	Epoch AI	`gpt-6-astra_max`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
Furniture Assembly not in index	Reasoning	80.0%	—	Epoch AI	`gpt-6-astra_max`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
Mystery Game Puzzles	Reasoning	84.0%	159	Epoch AI	`gpt-6-astra_max`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
FrontierMath Tier 4	Math	97.6%	152	Epoch AI	`gpt-6-astra_xhigh`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
FrontierMath Tiers 1–3	Math	93.7%	147	Epoch AI	`gpt-6-astra_max`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
OTIS Mock AIME 2024–2025	Math	100.0%	142	Epoch AI	`gpt-6-astra_max`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
GPQA Diamond	Knowledge	95.8%	143	Epoch AI	`gpt-6-astra_max`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
GPQA Diamond (OpenRouter run)	Knowledge	94.7%	145	OpenRouter	`openai/gpt-6-astra-20260903` OpenAI · first-party provider (1 of 3 rows)	Oct 18, 2026	OpenRouter benchmark datasets · data file
SimpleQA Verified	Knowledge	75.6%	156	Epoch AI	`gpt-6-astra_max`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
τ²-bench Airline (OpenRouter run)	Agents	67.7%	116	OpenRouter	`openai/gpt-6-astra-20260903` OpenAI · first-party provider (1 of 3 rows)	Oct 18, 2026	OpenRouter benchmark datasets · data file

Models with similar SI-IQ

Model	SI-IQ
GPT-6.1 SolOpenAI	148	GPT-6 Astra vs GPT-6.1 Sol
Claude Opus 5.5Anthropic	144	GPT-6 Astra vs Claude Opus 5.5
Claude Sonnet 5.5Anthropic	140	GPT-6 Astra vs Claude Sonnet 5.5
GPT-6 SolOpenAI	140	GPT-6 Astra vs GPT-6 Sol
Gemini 4 ArgonGoogle DeepMind	140	GPT-6 Astra vs Gemini 4 Argon

Computed with SI-IQ method version 1.0.0. Read the full methodology

Data sources: Epoch AI, ‘Capabilities & benchmarking’ (CC BY 4.0); API list prices via LiteLLM's price table (MIT); each price links to the developer's pricing page; Source: OpenRouter (openrouter.ai), licensed under CC BY 4.0.