Language modelActive

GPT-5.6 Sol

OpenAI

Released: June 26, 2026
Data date: August 24, 2026

Category view

Position within the category

This overview uses only published data from matching cohorts. Missing values never change a rank.

The index averages rank percentiles from 4 documented comparison cohorts. Only models with complete coverage receive a position.

Position: Rank 4 of 26
Index score: 81.7 / 100
Coverage: 4 / 4

Leaderboard

1Claude Opus 588.9 / 100

2Gemini 3.8 Flash88.5 / 100

3Claude Fable 583.2 / 100

4GPT-5.6 Sol81.7 / 100

5Gemini 3.7 Flash76.4 / 100

25MiMo-V2.5-Pro12.5 / 100

Source: Vals AI, GPQA Diamond Source: Vals AI, Vibe Code Bench v1.1 Source: Vals AI, Terminal-Bench 2.1 Source: Vals AI, Finance Agent (v2)

Measurements

Comparable benchmark results

Each chart contains exactly one source, one measurement series, and one stored comparison cohort. Bars show the position. The measured value appears on the right.

SimpleQA Verified v2

69.2% · Rank 3 of 5

Task: Kaggle score · Comparison cohort: simpleqa-verified-v2:official:overall · Data date: August 9, 2026

1.Gemini 3.1 Pro Preview77.5%

2.Gemini 3.5 Flash70.4%

3.GPT-5.6 Sol69.2%

4.Claude Opus 563.3%

5.Grok 4.553.8%

5 of 5 model versions shown in this chart. A higher value ranks first.

1,000 verified prompts without tools. Kaggle independently reproduced the results.

Source: KaggleParticipants: 5

AlmanBench v0.1

95.14% · Rank 2 of 5

Task: Accepted cases · Comparison cohort: almanbench-v0-1:official:overall · Data date: August 9, 2026

1.GPT-5.595.43%

2.GPT-5.6 Sol95.14%

3.Claude Opus 594.95%

4.DeepSeek-V4-Flash93%

5.Kimi K390.96%

5 of 5 model versions shown in this chart. A higher value ranks first.

1,029 public tasks with one direct run per row. The target is the Alman language specification.

Source: Alman InstitutParticipants: 5

LiveBench

81.05 points · Rank 2 of 4

Comparison cohort: livebench-2026-06-25-max · Data date: September 2, 2026

1.Claude Fable 582.97 points

2.GPT-5.6 Sol81.05 points

3.GPT-5.580.19 points

4.GPT-5.6 Terra77.94 points

4 of 4 model versions shown in this chart. A higher value ranks first.

23 objectively scored tasks across seven categories.

Source: LiveBenchParticipants: 4

LiveBench

91.7 points · Rank 1 of 4

Task: Reasoning · Comparison cohort: livebench-2026-06-25-reasoning-max · Data date: September 2, 2026

1.GPT-5.6 Sol91.7 points

2.GPT-5.6 Terra90.6 points

3.Claude Fable 589.7 points

3.GPT-5.589.7 points

4 of 4 model versions shown in this chart. A higher value ranks first.

Reasoning category inside the same LiveBench release.

Source: LiveBenchParticipants: 4

LiveBench

83.9 points · Rank 2 of 4

Task: Coding · Comparison cohort: livebench-2026-06-25-coding-max · Data date: September 2, 2026

1.Claude Fable 586 points

2.GPT-5.6 Sol83.9 points

3.GPT-5.582.1 points

4.GPT-5.6 Terra78.2 points

4 of 4 model versions shown in this chart. A higher value ranks first.

Coding category inside the same LiveBench release.

Source: LiveBenchParticipants: 4

LiveBench

56.2 points · Rank 2 of 4

Task: Agentic coding · Comparison cohort: livebench-2026-06-25-agentic-coding-max · Data date: September 2, 2026

1.Claude Fable 562.2 points

2.GPT-5.6 Sol56.2 points

3.GPT-5.6 Terra54.9 points

4.GPT-5.554 points

4 of 4 model versions shown in this chart. A higher value ranks first.

Agentic coding category inside the same LiveBench release.

Source: LiveBenchParticipants: 4

LiveBench

96.2 points · Rank 1 of 4

Task: Mathematics · Comparison cohort: livebench-2026-06-25-mathematics-max · Data date: September 2, 2026

1.GPT-5.6 Sol96.2 points

2.Claude Fable 596 points

3.GPT-5.595.9 points

4.GPT-5.6 Terra94.9 points

4 of 4 model versions shown in this chart. A higher value ranks first.

Mathematics category inside the same LiveBench release.

Source: LiveBenchParticipants: 4

LiveBench

79.8 points · Rank 3 of 4

Task: Data analysis · Comparison cohort: livebench-2026-06-25-data-analysis-max · Data date: September 2, 2026

1.GPT-5.581.6 points

2.Claude Fable 580.5 points

3.GPT-5.6 Sol79.8 points

4.GPT-5.6 Terra79.3 points

4 of 4 model versions shown in this chart. A higher value ranks first.

Data analysis category inside the same LiveBench release.

Source: LiveBenchParticipants: 4

LiveBench

87.7 points · Rank 2 of 4

Task: Language · Comparison cohort: livebench-2026-06-25-language-max · Data date: September 2, 2026

1.Claude Fable 590.7 points

2.GPT-5.6 Sol87.7 points

3.GPT-5.587.4 points

4.GPT-5.6 Terra82.9 points

4 of 4 model versions shown in this chart. A higher value ranks first.

Language category inside the same LiveBench release.

Source: LiveBenchParticipants: 4

LiveBench

71.8 points · Rank 2 of 4

Task: Instruction following · Comparison cohort: livebench-2026-06-25-instruction-following-max · Data date: September 2, 2026

1.Claude Fable 575.8 points

2.GPT-5.6 Sol71.8 points

3.GPT-5.570.7 points

4.GPT-5.6 Terra64.6 points

4 of 4 model versions shown in this chart. A higher value ranks first.

Instruction following category inside the same LiveBench release.

Source: LiveBenchParticipants: 4

SWE-Bench Pro

64.6% · Rank 3 of 5

Comparison cohort: swe-pro-openai-gpt-5-6-release · Data date: September 2, 2026

1.Claude Mythos 580.3%

2.Claude Fable 580%

3.GPT-5.6 Sol64.6%

4.GPT-5.6 Terra63.4%

5.GPT-5.6 Luna62.7%

5 of 5 model versions shown in this chart. A higher value ranks first.

Comparison table published by OpenAI. Not a Gradually test.

After an audit, OpenAI estimates that about 30% of the public tasks are broken. The result therefore remains a disputed secondary signal. The rows are an editorial selection from the respective comparison table.

Source: OpenAIParticipants: 5

PRBench Finance

50.45% · Rank 2 of 4

Task: Overall · Comparison cohort: scale-prbench-finance-full · Data date: August 26, 2026

1.Claude Fable 553.86%

2.GPT-5.6 Sol50.45%

3.GPT-5.445.63%

4.Gemini 3.1 Pro Preview41.87%

4 of 4 model versions shown in this chart. A higher value ranks first.

600 finance tasks with task-specific rubrics and o4-mini as judge.

Source: Scale AIParticipants: 4

PRBench Legal

50.5% · Rank 2 of 4

Task: Overall · Comparison cohort: scale-prbench-legal-full · Data date: August 26, 2026

1.Claude Fable 552.56%

2.GPT-5.6 Sol50.5%

3.GPT-5.444.35%

4.Gemini 3.1 Pro Preview44.02%

4 of 4 model versions shown in this chart. A higher value ranks first.

500 legal tasks with task-specific rubrics and o4-mini as judge.

Source: Scale AIParticipants: 4

EnigmaEval

37.12% · Rank 2 of 4

Task: Overall · Comparison cohort: scale-enigma-eval-2026-07-23 · Data date: August 26, 2026

1.Claude Fable 539.28%

2.GPT-5.6 Sol37.12%

3.Gemini 3.1 Pro Preview36.78%

4.Gemini 3.5 Flash25.41%

4 of 4 model versions shown in this chart. A higher value ranks first.

Complex multimodal puzzles with exact answer matching and one attempt.

Source: Scale AIParticipants: 4

Profile

Specifications and access

Published information about this model. Unknown values are not estimated.

Model type: ProprietarySource
Context window: 1,050,000 tokensSource
Knowledge cutoff: February 16, 2026Source
Notes: Flagship of the GPT-5.6 family (Sol, Terra, Luna). Previewed 2026-06-26, generally available from 2026-07-09 after the US government lifted the restricted-access framework. Available in ChatGPT (Plus, Pro, Business, Enterprise from medium effort setting; Pro and Enterprise also get Sol Pro), Codex, and the API. Terminal-Bench 2.1 88.8% (Sol Ultra mode with four parallel sub-agents: 91.9%), Artificial Analysis Coding Agent Index 80, SWE-Bench Pro 64.6% (about 15 points behind Claude Mythos 5 and Fable 5). New at GA: programmatic tool calling with model-written JavaScript in a V8 sandbox.Source