WhichAI / Models / Claude Sonnet 5

Claude Sonnet 5

· verified July 26, 2026

public free api in Generator writing coding value

Provider

Statuspublic

AA Intelligence Index53.4 (July 16, 2026 snapshot)

Releasedn/a

Context window1M

Modalitiesn/a

API price $/1M (in / out)$2 / $10 · intro API price to Aug 31, 2026 - then $3/$15

Speedn/a

AccessFREE tier of claude.ai · API

In one line

The strongest free option on the market - frontier-adjacent writing and coding quality at zero cost. Best zero-budget daily driver for text work.

Coding84

Reasoning82

Writing86

Agents & tools80

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

Alternatives worth a look

Grok 4.5 (xAI) · AA 53.8Released July 8, 2026 · API $2/$6 per 1M tokens · in Grok Build & Cursor · not yet in the EU
GPT-5.5 (OpenAI) · AA 54.8Free (limited messages) · Plus $20/mo · Go ~$8/mo · API
GPT-5.6 Terra (OpenAI) · AA 55Released July 9, 2026 · API $2.50/$15 per 1M tokens

Head-to-head: Claude Sonnet 5 vs GPT-5.5

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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).