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Model Pareto

GPT-5.6 Terra

OpenAIProprietaryopenai.com ↗
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Input
$2.00/M tok
Output
$12/M tok
Blended
$4.50/M tok · 3:1
Speed
83tok/s
Context
1Mtokens

Launched at $2.50/$15; cut to $2/$12 on 2026-07-30.

Rankings

Benchmark scores

~ italic, dashed = no published score yet, estimated from related benchmarks.

Coding

SWE-bench VerifiedEstimated
~#2 of 14 (estimated)~85.8%
  1. #1Claude Opus 596.0%
  2. ~#2GPT-5.6 TerraEstimated85.8%
  3. #2Claude Sonnet 585.2%
No published score — estimated from related benchmarks
LiveCodeBenchEstimated
~#2 of 20 (estimated)~92.1%
  1. #1Qwen3.8-Omni-Flash92.6%
  2. ~#2GPT-5.6 TerraEstimated92.1%
  3. #2Qwen3.8 Flash-Next91.9%
No published score — estimated from related benchmarks
AA Coding Agent IndexEstimated
~#10 of 15 (estimated)~51.2
  1. #1Claude Opus 5.566.0
  2. #2Claude Fable 5.162.2
  3. #9Kimi K351.9
  4. ~#10GPT-5.6 TerraEstimated51.2
  5. #10Grok 4.647.0
No published score — estimated from related benchmarks

Writing & chat

MMMLUEstimated
~#2 of 5 (estimated)~90.4%
  1. #1Gemini 3.1 Pro92.6%
  2. ~#2GPT-5.6 TerraEstimated90.4%
  3. #2Gemma 4 31B88.4%
No published score — estimated from related benchmarks
LMArena Text, Non-English (Elo)Verified
#15 of 531456 Elo
  1. #1Claude Opus 5.51501
  2. #2Claude Fable 5.1Few votes1496
  3. #14GPT-6 AstraFew votes1460
  4. #15GPT-5.6 Terra1456
  5. #16DeepSeek V4 Pro (0813)1448
lmarena.ai · 2026-09-24
LMArena Text (Elo)Verified
#15 of 531466 Elo
  1. #1Claude Opus 5.51509
  2. #2Claude Fable 5.11501
  3. #14GLM-5.3 Flash1475
  4. #15GPT-5.6 Terra1466
  5. #16DeepSeek V4 Pro (0813)1463
lmarena.ai · 2026-09-24

Vision

MMMUEstimated
~#2 of 3 (estimated)~71.3%
  1. #1Claude Haiku 4.573.2%
  2. ~#2GPT-5.6 TerraEstimated71.3%
  3. #2Llama 4 Maverick69.4%
No published score — estimated from related benchmarks
CharXiv ReasoningEstimated
~#4 of 9 (estimated)~83.8%
  1. #1Gemini 3.8 Flash86.2%
  2. #2Kimi K384.8%
  3. #3Qwen3.8 Flash-Next84.6%
  4. ~#4GPT-5.6 TerraEstimated83.8%
  5. #4Qwen3.8-Omni-Flash83.5%
No published score — estimated from related benchmarks
OmniDocBench v1.5Estimated
~#4 of 8 (estimated)~90.1%
  1. #1MiniMax-M391.6%
  2. #2Kimi K391.1%
  3. #2Qwen3.8 27B91.1%
  4. ~#4GPT-5.6 TerraEstimated90.1%
  5. #4Gemini 3.1 Pro85.3%
No published score — estimated from related benchmarks

Hard reasoning

AIME (latest)Estimated
~#2 of 25 (estimated)~96.8%
  1. #1Inkling97.1%
  2. ~#2GPT-5.6 TerraEstimated96.8%
  3. #2Muse Glimmer94.7%
No published score — estimated from related benchmarks

Agents

OSWorld-VerifiedEstimated
~#6 of 12 (estimated)~81.2%
  1. #1Kimi K384.8%
  2. #2Qwen3.8 27B84.3%
  3. #5Claude Sonnet 581.2%
  4. ~#6GPT-5.6 TerraEstimated81.2%
  5. #6MiMo-V2.6-Flash80.8%
No published score — estimated from related benchmarks