o3 review, price and benchmarks (2026)

legacy paid api reasoning

Provider

Statuslegacy

AA Intelligence Index30.4 (July 16, 2026 snapshot)

Releasedn/a

Context windown/a

Modalitiesn/a

API price $/1M (in / out)n/a

Speedn/a

AccessAPI (legacy)

In one line

Once the reasoning benchmark-setter; today mainly of historical and compatibility interest.

Coding55

Reasoning62

Writing42

Agents & tools48

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

Alternatives worth a look

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Gemma 4 31B (Google) · AA 29.4Open weights · runs on consumer hardware

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Artificial Analysis Intelligence Index, 2026 rebased scale (top models ≈ 55–60). Snapshot: July 24, 2026 (BenchLM mirror), retrieved July 26, 2026. Context, price and release data come from vendor pages and public pricing mirrors (retrieved July 19, 2026). Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (Model guide and About > Methodology).