WhichAI / Models / GPT-6 Astra

GPT-6 Astra

· verified October 14, 2026

public paid api in Generator reasoning agents coding vision long-context

Provider

Statuspublic

AA Intelligence Index52.7 (official, read October 14, 2026)

Released2026-09-04

Context window1.05M

ModalitiesText + image + files

API price $/1M (in / out)$10 / $50 · $1 per 1M cached input · 128K max output · a Pro tier and a half-price batch tier ship alongside

Speedn/a

AccessReleased September 4, 2026 · API $10/$50 per 1M tokens ($1 cached) · ChatGPT Plus and Pro · batch tier at $5/$25

In one line

OpenAI's next-numbered flagship, shipped September 4 after months of rumour. It ends OpenAI's run of point releases: 1.05M context, native image and file input, and a price that doubles Sol's. Worth knowing before you switch: it scores below both Anthropic flagships on the index, and Sol remains the better value for agentic work at a fifth of the output price.

Coding91

Reasoning93

Writing84

Agents & tools93

Category scores (0-100) are WhichAI blended ratings: public category leaderboards plus editorial judgment. Guidance, not official measurements.

Alternatives worth a look

Gemini 4 Argon (Google) · AA 52.6API $2/$10 per 1M tokens on OpenRouter · listed October 13, 2026
Claude Fable 5.1 (Anthropic) · AA 53.4Released September 1, 2026 · Claude Pro and Max · API $10/$50 per 1M tokens ($0.25 cached)
GPT-6.1 Sol (OpenAI) · AA 51.8API $2/$10 per 1M tokens on OpenRouter · listed September 29, 2026

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Artificial Analysis Intelligence Index, official scale (the number published on artificialanalysis.ai), relayed by OpenRouter and refreshed automatically: last read October 14, 2026. 209 models carry a current official measurement. A value marked ~ is converted from an earlier snapshot because no current measurement is published; an unmeasured model is never ranked. Context, price, modality and listing dates come from the public OpenRouter model list (refreshed automatically on the live site; static copy retrieved October 3, 2026) and vendor pages. Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (the Ranking chapter and About > Methodology).