GPT-5.5 review, price and benchmarks (2026)

public free paid api in Generator coding reasoning writing

Provider

Statuspublic

AA Intelligence Index54.8 (July 16, 2026 snapshot)

Released2026-04

Context windown/a

Modalitiesn/a

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

Speedn/a

AccessFree (limited messages) · Plus $20/mo · Go ~$8/mo · API

In one line

The April 2026 flagship, still the strongest broad generalist most people can use free: brainstorming, drafting, frontier coding (SWE-bench Verified 88.7%).

Coding88

Reasoning86

Writing82

Agents & tools84

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

Alternatives worth a look

GPT-5.6 Terra (OpenAI) · AA 55Released July 9, 2026 · API $2.50/$15 per 1M tokens
Claude Opus 4.8 (Anthropic) · AA 55.7Claude Pro $20/mo · API
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

Head-to-head: GPT-5.5 vs Claude Sonnet 5 · GPT-5.5 vs Claude Opus 4.8

Open GPT-5.5's official app ↗ Open in the WhichAI app Not sure? Take the 30-second finder

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).