WhichAI / Models / GPT-5.6 Sol

GPT-5.6 Sol

· verified October 14, 2026

public paid api in Generator reasoning agents coding

Provider

Statuspublic

AA Intelligence Index47 (official, read October 14, 2026)

Released2026-07-09

Context window1M

Modalitiesn/a

API price $/1M (in / out)$4 / $20 (OpenRouter)

Speedup to 750 tok/s (Cerebras)

AccessReleased July 9, 2026 (rolling out) · API $4/$20 per 1M tokens · up to 750 tok/s on Cerebras

In one line

OpenAI's July flagship: max reasoning effort, programmatic tool calling and an 'ultra mode' that spins up subagents. Since GPT-6 Astra arrived at double the output price, Sol is the better-value half of OpenAI's line for agentic work.

Coding91

Reasoning93

Writing82

Agents & tools93

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

Alternatives worth a look

GPT-6 Sol (OpenAI) · AA 47.6API $2/$10 per 1M tokens on OpenRouter · listed September 22, 2026
Grok 4.7 (xAI) · AA 46.4API $2/$6 per 1M tokens on OpenRouter · listed September 21, 2026
MiMo-V2.6-Pro (Xiaomi) · AA 46.3API $0.435/$0.87 per 1M tokens on OpenRouter · open weights · listed September 21, 2026

Head-to-head: GPT-5.6 Sol vs Claude Opus 5 · GPT-5.6 Sol vs Claude Fable 5 · GPT-5.6 Sol vs Kimi K3

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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).