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GPT-5.6 Luna benchmarks, ranks and price

Where Artificial Analysis, LiveBench, LMArena and Berkeley BFCL place GPT-5.6 Luna, what it costs through OpenRouter and Vercel AI Gateway, and the models either side of it on the consensus.

Updated Oct 1, 2026Full leaderboardSources and method

Read Oct 1, 2026

#32of 85

on the LLM leaderboard, with a consensus score of 54 across 2 leaderboards.

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

By leaderboard

Where each leaderboard places GPT-5.6 Luna

Artificial Analysis

#10of 51

Score 37.3. Best run: openai/gpt-5.6-luna.

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

LiveBench

#24of 34

Score 71.0. Best run: GPT 5.6 Luna xHigh.

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

LMArena

Not measured by LMArena.

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

$0.45

OpenRouter: $0.20 in, $1.20 out. Vercel AI Gateway: $0.20 in, $1.20 out Context window 1.1M tokens. LiveBench cost per solved task $0.123.

Nearby

The models either side of GPT-5.6 Luna

  1. #29DeepSeek V4 Pro 042358
  2. #30deepseek-v3.258
  3. #31grok-4-070956
  4. #32GPT-5.6 Luna54
  5. #33gemini-2.5-flash54
  6. #34Claude Haiku 4.553
  7. #35Kimi K2.653

Questions about GPT-5.6 Luna

How good is GPT-5.6 Luna?
GPT-5.6 Luna ranks #32 of 85 models on the Rank.ai LLM leaderboard, with a consensus score of 54 out of 100 across 2 leaderboards.
Is GPT-5.6 Luna better than grok-4-0709?
Not on the consensus: grok-4-0709 scores 56 to GPT-5.6 Luna's 54. Compare them source by source below, since the leaderboards test different things.
Is GPT-5.6 Luna better than gemini-2.5-flash?
On the consensus, yes: 54 to 54.
How much does GPT-5.6 Luna cost?
$0.20 per million input tokens and $1.20 per million output tokens on OpenRouter, the cheaper listing we read. Blended at three input tokens to one output, that is $0.45 per million.
Is GPT-5.6 Luna good for coding?
It scores 71.4 on the Artificial Analysis Coding Index, placing it #10 for coding among the models on this leaderboard.

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