Skip to content
Get my AI grade

OpenAI

GPT-5.6 Terra benchmarks, ranks and price

Where Artificial Analysis, LiveBench, LMArena and Berkeley BFCL place GPT-5.6 Terra, 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

#18of 85

on the LLM leaderboard, with a consensus score of 66 across 2 leaderboards.

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

By leaderboard

Where each leaderboard places GPT-5.6 Terra

Artificial Analysis

#5of 51

Score 42.1. Best run: openai/gpt-5.6-terra.

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

LiveBench

#16of 34

Score 74.3. Best run: GPT 5.6 Terra 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

$4.50

OpenRouter: $2.00 in, $12 out. Vercel AI Gateway: $2.00 in, $12 out Context window 1.1M tokens. LiveBench cost per solved task $0.208.

Nearby

The models either side of GPT-5.6 Terra

  1. #15Claude Opus 4.5 20251101 Thinking 64K High Effort68
  2. #16Gemini 3.5 Flash67
  3. #17Gemini 3.6 Flash67
  4. #18GPT-5.6 Terra66
  5. #19grok-4-1-fast-reasoning65
  6. #20Claude Sonnet 4.564
  7. #21glm-4.664

Questions about GPT-5.6 Terra

How good is GPT-5.6 Terra?
GPT-5.6 Terra ranks #18 of 85 models on the Rank.ai LLM leaderboard, with a consensus score of 66 out of 100 across 2 leaderboards.
Is GPT-5.6 Terra better than Gemini 3.6 Flash?
Not on the consensus: Gemini 3.6 Flash scores 67 to GPT-5.6 Terra's 66. Compare them source by source below, since the leaderboards test different things.
Is GPT-5.6 Terra better than grok-4-1-fast-reasoning?
On the consensus, yes: 66 to 65.
How much does GPT-5.6 Terra cost?
$2.00 per million input tokens and $12 per million output tokens on OpenRouter, the cheaper listing we read. Blended at three input tokens to one output, that is $4.50 per million.
Is GPT-5.6 Terra good for coding?
It scores 76.7 on the Artificial Analysis Coding Index, placing it #3 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.