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GPT-5.5 benchmarks, ranks and price

Where Artificial Analysis, LiveBench, LMArena and Berkeley BFCL place GPT-5.5, what it costs through OpenRouter and Vercel AI Gateway, and the models either side of it on the consensus.

Updated Oct 16, 2026Full leaderboardSources and method

Read Oct 16, 2026

#4of 121

on the LLM leaderboard, with a consensus score of 82 across 3 leaderboards.

Source: Artificial Analysis, LiveBench, LMArena and Berkeley BFCL, combined by Rank.ai.

By leaderboard

Where each leaderboard places GPT-5.5

Artificial Analysis

#10of 110

Score 38.4. Best run: openai/gpt-5.5.

Intelligence Index: a composite of reasoning, knowledge, maths and coding evaluations.

LiveBench

#2of 36

Score 79.9. Best run: GPT 5.5 xHigh.

Contamination-limited questions refreshed each release: reasoning, maths, coding, data analysis, language.

LMArena

#11of 111

Score 1482. Best run: gpt-5.5-high.

Blind head-to-head human votes, style controlled.

Berkeley BFCL

Not measured by Berkeley BFCL.

Function calling and tool use, single turn to multi turn and web search.

Price and context

$11

OpenRouter: $5.00 in, $30 out. Vercel AI Gateway: $5.00 in, $30 out Context window 1.1M tokens. LiveBench cost per solved task $0.530.

Nearby

The models either side of GPT-5.5

  1. #1Claude Fable 585
  2. #2GPT-5.6 Sol84
  3. #3Claude Opus 583
  4. #4GPT-5.582
  5. #5Kimi K382
  6. #6Claude Opus 4.881
  7. #7gemini-3-pro80

Questions about GPT-5.5

How good is GPT-5.5?
GPT-5.5 ranks #4 of 121 models on the Rank.ai LLM leaderboard, with a consensus score of 82 out of 100 across 3 leaderboards.
Is GPT-5.5 better than Claude Opus 5?
Not on the consensus: Claude Opus 5 scores 83 to GPT-5.5's 82. Compare them source by source below, since the leaderboards test different things.
Is GPT-5.5 better than Kimi K3?
On the consensus, yes: 82 to 82.
How much does GPT-5.5 cost?
$5.00 per million input tokens and $30 per million output tokens on OpenRouter, the cheaper listing we read. Blended at three input tokens to one output, that is $11 per million.
Is GPT-5.5 good for coding?
It scores 74.9 on the Artificial Analysis Coding Index, placing it #6 for coding among the models on this leaderboard.

These models recommend brands. See if they name yours.

Enter your website. In about two minutes, Rank.ai asks ChatGPT, Claude and Gemini 12 questions your customers ask and grades how often they name you.

  • Your grade out of 100How often AI names you, cites your site, and how high it ranks you.
  • Who gets namedEvery competitor in the answers, most named first.
  • The pages AI readsThe sources behind each answer.
  • Three fixesWhat to fix first, with a brief for the first article.