DeepSeek-V4-Pro vs GPT-5.6 Sol
Wins 0 of 7 areas
—
Wins 6 of 7 areas
Coding · Agents · Reasoning · Facts · Math · Long documents
GPT-5.6 Sol is the stronger all-rounder.DeepSeek-V4-Pro is cheaper.
Scores updated · 59 tests both models report · How we compare
Where each one wins
Tests won in each of the seven areas where both have results. 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 software07GPT-5.6 Sol7 of 7 tests
- AgentsCarrying out multi-step tasks on its own07GPT-5.6 Sol7 of 7 tests
- ReasoningHard problems that need careful thinking05GPT-5.6 Sol5 of 5 tests
- MathCompetition and research-level math04GPT-5.6 Sol4 of 4 tests
- FactsGetting facts right instead of making them up13GPT-5.6 Sol3 of 4 tests
- Long documentsFinding answers in very long texts01GPT-5.6 Sol1 of 1 test
- Following instructionsDoing exactly what it is asked11Even1 each
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.
DeepSeek-V4-Pro costs 95% 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+80.6points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+43.8points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+25.3points ahead
Where DeepSeek-V4-Pro pulls ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+3.8points ahead
Every test, side by side
All 59 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.6 Sol
- Terminal-Bench 2.1GPT-5.6 Sol by 246488+24
- Terminal-Bench HardGPT-5.6 Sol by 19.746.265.9+19.7
- LMArena · WebDevGPT-5.6 Sol by 157 rating points14631620+157 rating
- LiveBench · CodingGPT-5.6 Sol by 13.97083.9+13.9
- LiveBench · Agentic CodingGPT-5.6 Sol by 13.642.656.2+13.6
- SWE-bench ProGPT-5.6 Sol by 9.255.464.6+9.2
- SciCodeGPT-5.6 Sol by 6.350.857.1+6.3
AgentsGPT-5.6 Sol
- Terminal-Bench 4.0GPT-5.6 Sol by 25.314.639.9+25.3
- GDPValGPT-5.6 Sol by 22.732.955.6+22.7
- AA IT-Bench SREGPT-5.6 Sol by 17.938.356.2+17.9
- AA ApexAgentsGPT-5.6 Sol by 15.624.339.9+15.6
- τ-Bench V3 · BankingGPT-5.6 Sol by 14.230.144.3+14.2
- MCP AtlasGPT-5.6 Sol by 1073.683.6+10
- BrowseCompGPT-5.6 Sol by 783.490.4+7
ReasoningGPT-5.6 Sol
- CritPtGPT-5.6 Sol by 19.412.932.3+19.4
- SimpleBenchGPT-5.6 Sol by 13.950.964.8+13.9
- Humanity's Last ExamGPT-5.6 Sol by 1237.549.5+12
- LiveBench · ReasoningGPT-5.6 Sol by 982.791.7+9
- GPQA DiamondGPT-5.6 Sol by 5.388.894.1+5.3
FactsGPT-5.6 Sol
- SimpleQA VerifiedGPT-5.6 Sol by 23.546.269.7+23.5
- AA-Omniscience · AccuracyGPT-5.6 Sol by 16.44359.4+16.4
- Vectara HHEM hallucination ratelower is betterDeepSeek-V4-Pro by 3.88.612.4+3.8
- AA-Omniscience · Non-hallucinationGPT-5.6 Sol by 1.95.97.8+1.9
MathGPT-5.6 Sol
- FrontierMath Tier 4GPT-5.6 Sol by 80.62.483+80.6
- FrontierMath Tiers 1-3 (v2)GPT-5.6 Sol by 43.845.389.1+43.8
- LiveBench · MathematicsGPT-5.6 Sol by 5.590.796.2+5.5
- AIME 2026GPT-5.6 Sol by 3.296.799.9+3.2
Following instructionsEven
- LiveBench · Instruction FollowingGPT-5.6 Sol by 9.562.471.8+9.5
- IFBenchDeepSeek-V4-Pro by 3.876.572.7+3.8
Other results29 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.
- DeepSWEGPT-5.6 Sol by 59.912.872.7+59.9
- GDPval-AA v2GPT-5.6 Sol by 405 rating points13061711+405 rating
- AA-OmniscienceGPT-5.6 Sol by 32.7-10.722+32.7
- Agents' Last ExamGPT-5.6 Sol by 2725.752.7+27
- Terminal-Bench 4.0GPT-5.6 Sol by 24.912.437.3+24.9
- MathArena Apex (Pass@1)DeepSeek-V4-Pro by 24.690.265.6+24.6
- AA Agentic IndexGPT-5.6 Sol by 22.827.750.5+22.8
- Program BenchDeepSeek-V4-Pro by 22.847.825+22.8
- Terminal-bench 3.0GPT-5.6 Sol by 22.611.834.4+22.6
- Toolathlon VerifiedGPT-5.6 Sol by 1955.974.9+19
- Artificial Analysis Coding IndexGPT-5.6 Sol by 1859.477.4+18
- AA IntelligenceGPT-5.6 Sol by 16.630.447+16.6
- τ²-Bench Telecom (AA run)DeepSeek-V4-Pro by 11.196.285.1+11.1
- DeepSWE v1.1 (Resolved)GPT-5.6 Sol by 10.362.773+10.3
- livebench_languageGPT-5.6 Sol by 9.678.187.7+9.6
- SWEBench Pro PublicGPT-5.6 Sol by 9.255.464.6+9.2
- ProgramBench (Almost@1)GPT-5.6 Sol by 7.515.523+7.5
- τ³-Bench BankingGPT-5.6 Sol by 72633+7
- ToolathlonGPT-5.6 Sol by 6.251.858+6.2
- BrowseComp (w/ Ctx)GPT-5.6 Sol by 683.489.4+6
- livebench_data_analysisGPT-5.6 Sol by 5.374.579.8+5.3
- NL2Repo-Bench (Score)DeepSeek-V4-Pro by 4.761.556.8+4.7
- HLE (with tools)GPT-5.6 Sol by 4.56064.5+4.5
- vectara_factual_consistencyDeepSeek-V4-Pro by 3.891.487.6+3.8
- Global-MMLU-LiteGPT-5.6 Sol by 2.589.391.8+2.5
- vectara_avg_summary_lengthDeepSeek-V4-Pro by 22.7 rating points153.8131.1+22.7 rating
- vectara_answer_rateGPT-5.6 Sol by 1.997.299.1+1.9
- CyberGymGPT-5.6 Sol by 1.283.384.5+1.2
- StrongREJECTtie98.698.5tie
Questions people ask
Which is better, DeepSeek-V4-Pro or GPT-5.6 Sol?
GPT-5.6 Sol wins six of the seven areas where both have results: coding, agents, reasoning, facts, math and long documents. DeepSeek-V4-Pro wins none, but costs 95% less. They are level on following instructions.
Which is better for coding?
GPT-5.6 Sol. It wins 7 of the 7 coding tests both models report; DeepSeek-V4-Pro wins none.
Which is cheaper?
DeepSeek-V4-Pro costs $0.43 per million input tokens and $0.87 per million output tokens; GPT-5.6 Sol costs $4.00 and $20.00. That makes DeepSeek-V4-Pro about 95% cheaper for the same work.
How do you compare the two?
We use the 59 benchmark tests both models have published scores on. The verdict counts the 30 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 29 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.