Claude Opus 4.6 vs GPT-5.6 Sol
Wins 0 of 8 areas
—
Wins 8 of 8 areas
Coding · Agents · Reasoning · Facts · Images and charts · Math · Long documents · Following instructions
GPT-5.6 Sol is the stronger all-rounder.
Scores updated · 51 tests both models report · How we compare
Where each one wins
Tests won in each of the eight areas we test. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- CodingWriting and fixing software06GPT-5.6 Sol6 of 6 tests
- ReasoningHard problems that need careful thinking16GPT-5.6 Sol6 of 7 tests
- AgentsCarrying out multi-step tasks on its own04GPT-5.6 Sol4 of 5 tests · 1 tie
- MathCompetition and research-level math04GPT-5.6 Sol4 of 4 tests
- Following instructionsDoing exactly what it is asked02GPT-5.6 Sol2 of 2 tests
- FactsGetting facts right instead of making them up12GPT-5.6 Sol2 of 4 tests · 1 tie
- Images and chartsUnderstanding pictures, charts and video12GPT-5.6 Sol2 of 3 tests
- Long documentsFinding answers in very long texts01GPT-5.6 Sol1 of 1 test
Long documents rests on a single test.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
GPT-5.6 Sol costs 20% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where GPT-5.6 Sol pulls ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+56.2points ahead
- Abstract visual puzzles that people can solveARC-AGI-2+23.7points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+23.1points ahead
Where Claude Opus 4.6 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+29.4points ahead
- Common-sense trick questionsSimpleBench+2.8points ahead
Every test, side by side
All 51 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.6 Sol
- Terminal-Bench HardGPT-5.6 Sol by 19.746.265.9+19.7
- SWE-bench ProGPT-5.6 Sol by 11.253.464.6+11.2
- LiveBench · Agentic CodingGPT-5.6 Sol by 7.24956.2+7.2
- LMArena · WebDevGPT-5.6 Sol by 72 rating points15461618+72 rating
- LiveBench · CodingGPT-5.6 Sol by 5.778.283.9+5.7
- SciCodeGPT-5.6 Sol by 5.251.957.1+5.2
AgentsGPT-5.6 Sol
- MCP AtlasGPT-5.6 Sol by 20.962.783.6+20.9
- OSWorld-VerifiedGPT-5.6 Sol by 10.372.783+10.3
- AA ApexAgentsGPT-5.6 Sol by 6.93339.9+6.9
- BrowseCompGPT-5.6 Sol by 6.48490.4+6.4
- GDPValtie55.955.6tie
ReasoningGPT-5.6 Sol
- ARC-AGI-2GPT-5.6 Sol by 23.768.892.5+23.7
- CritPtGPT-5.6 Sol by 19.712.632.3+19.7
- Humanity's Last ExamGPT-5.6 Sol by 9.639.949.5+9.6
- ARC-AGI-3GPT-5.6 Sol by 7.30.57.8+7.3
- GPQA DiamondGPT-5.6 Sol by 4.589.694.1+4.5
- LiveBench · ReasoningGPT-5.6 Sol by 388.791.7+3
- SimpleBenchClaude Opus 4.6 by 2.867.664.8+2.8
FactsGPT-5.6 Sol
- AA-Omniscience · Non-hallucinationClaude Opus 4.6 by 29.437.27.8+29.4
- SimpleQA VerifiedGPT-5.6 Sol by 22.74769.7+22.7
- AA-Omniscience · AccuracyGPT-5.6 Sol by 12.44759.4+12.4
- Vectara HHEM hallucination ratelower is bettertie12.212.4tie
Images and chartsGPT-5.6 Sol
- CharXiv (RQ)GPT-5.6 Sol by 8.477.485.8+8.4
- MMMU-ProGPT-5.6 Sol by 875.483.4+8
- LMArena · VisionClaude Opus 4.6 by 37 rating points13161279+37 rating
MathGPT-5.6 Sol
- FrontierMath Tier 4GPT-5.6 Sol by 56.226.883+56.2
- FrontierMath Tiers 1-3 (v2)GPT-5.6 Sol by 23.16689.1+23.1
- LiveBench · MathematicsGPT-5.6 Sol by 6.989.396.2+6.9
- AIME 2026GPT-5.6 Sol by 3.296.799.9+3.2
Following instructionsGPT-5.6 Sol
- IFBenchGPT-5.6 Sol by 19.653.172.7+19.6
- LiveBench · Instruction FollowingGPT-5.6 Sol by 8.663.371.8+8.6
Other results19 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- Artificial Analysis Coding IndexGPT-5.6 Sol by 29.348.177.4+29.3
- LVBenchGPT-5.6 Sol by 19.16382.1+19.1
- AA Agentic IndexClaude Opus 4.6 by 17.167.650.5+17.1
- AA IntelligenceGPT-5.6 Sol by 15.131.947+15.1
- HLE (with tools)GPT-5.6 Sol by 11.253.364.5+11.2
- CyberGymGPT-5.6 Sol by 10.773.884.5+10.7
- livebench_data_analysisGPT-5.6 Sol by 9.969.979.8+9.9
- JobBenchGPT-5.6 Sol by 8.836.645.4+8.8
- AA-OmniscienceGPT-5.6 Sol by 8.313.722+8.3
- τ²-Bench Telecom (AA run)Claude Opus 4.6 by 792.185.1+7
- OfficeQA ProGPT-5.6 Sol by 6.157.163.2+6.1
- HiL-Bench (Tools-allowed)Claude Opus 4.6 by 638.332.3+6
- livebench_languageGPT-5.6 Sol by 4.483.387.7+4.4
- ARC-AGI-1GPT-5.6 Sol by 3.59396.5+3.5
- charxiv_rq_with_pythonGPT-5.6 Sol by 3.184.787.8+3.1
- ToolathlonGPT-5.6 Sol by 1.256.858+1.2
- vectara_answer_ratetie99.899.1tie
- vectara_avg_summary_lengthtie137.6131.1tie
- vectara_factual_consistencytie87.887.6tie
Questions people ask
Which is better, Claude Opus 4.6 or GPT-5.6 Sol?
GPT-5.6 Sol wins all eight areas we test: coding, agents, reasoning, facts, images and charts, math, long documents and following instructions. Claude Opus 4.6 wins none.
Which is better for coding?
GPT-5.6 Sol. It wins 6 of the 6 coding tests both models report; Claude Opus 4.6 wins none.
Which is cheaper?
Claude Opus 4.6 costs $5.00 per million input tokens and $25.00 per million output tokens; GPT-5.6 Sol costs $4.00 and $20.00. That makes GPT-5.6 Sol about 20% cheaper for the same work.
How do you compare the two?
We use the 51 benchmark tests both models have published scores on. The verdict counts the 32 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 19 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.