WhichAI / Models / GPT-5.4

GPT-5.4

· verified October 14, 2026

public paid api in Generator coding reasoning

Provider

Statuspublic

AA Intelligence Index39 (official, read October 14, 2026)

Released2026-03-05

Context window1.05M

Modalitiesn/a

API price $/1M (in / out)$2.5 / $15 (OpenRouter)

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

Grok 4.5 (xAI) · AA 38.8Released July 8, 2026 · API $2/$6 per 1M tokens · in Grok Build & Cursor · not yet in the EU
DeepSeek V4.1 Flash (DeepSeek) · AA 39.5API $0.016/$0.891 per 1M tokens on OpenRouter · open weights · listed September 10, 2026
GPT-5.5 (OpenAI) · AA 38.4Free (limited messages) · Plus $20/mo · Go ~$8/mo · API

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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).