GPT-5.4 review, price and benchmarks (2026)

public paid api in Generator coding reasoning

Provider

Statuspublic

AA Intelligence Index51.4 (July 16, 2026 snapshot)

Releasedn/a

Context windown/a

Modalitiesn/a

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

Speedn/a

AccessChatGPT Plus · API · inside Perplexity Pro

In one line

The previous flagship, still very strong and a reliable known quantity - often cheaper per token than its successors.

Coding82

Reasoning80

Writing76

Agents & tools78

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 Luna (OpenAI) · AA 51.2Released July 9, 2026 · API $1/$6 per 1M tokens
GLM-5.2 (Z.ai) · AA 51.1Open weights · low-cost API hosts
Muse Spark 1.1 (Meta) · AA 50.6API via Meta Superintelligence Labs (Meta's first paid model, July 9, 2026)

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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).