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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 12, 2026Full leaderboardSources and method

Read Oct 12, 2026

#23of 122

on the LLM leaderboard, with a consensus score of 68 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 111

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

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

LiveBench

#16of 36

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. #20Claude Sonnet 4.569
  2. #21GLM 5.169
  3. #22GLM 568
  4. #23GPT-5.6 Terra68
  5. #24GLM 5.267
  6. #25grok-4-1-fast-reasoning67
  7. #26Qwen3.7 Plus66

Questions about GPT-5.6 Terra

How good is GPT-5.6 Terra?
GPT-5.6 Terra ranks #23 of 122 models on the Rank.ai LLM leaderboard, with a consensus score of 68 out of 100 across 2 leaderboards.
Is GPT-5.6 Terra better than GLM 5?
Not on the consensus: GLM 5 scores 68 to GPT-5.6 Terra's 68. Compare them source by source below, since the leaderboards test different things.
Is GPT-5.6 Terra better than GLM 5.2?
On the consensus, yes: 68 to 67.
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.

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