WhichAI / Models / o3-pro

o3-pro

· verified October 14, 2026

legacy paid api reasoning

Provider

Statuslegacy

AA Intelligence Index21.9 (official, read October 14, 2026)

Released2025-06-10

Context window200K

Modalitiesn/a

API price $/1M (in / out)$20 / $80 (OpenRouter)

Speedn/a

AccessAPI (legacy reasoning line)

In one line

The 2025 deep-reasoning specialist - slow and dated now, but a milestone in chain-of-thought models.

Coding58

Reasoning66

Writing45

Agents & tools50

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

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GLM 4.7 (Z.ai) · AA 22.2API $0.6/$2.2 per 1M tokens on OpenRouter · open weights · listed December 22, 2025

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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).