GPT-5.6 Sol vs Kimi K2.7 Code
Wins 7 of 7 areas
Coding · Agents · Reasoning · Facts · Math · Long documents · Following instructions
Wins 0 of 7 areas
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GPT-5.6 Sol is the stronger all-rounder.Kimi K2.7 Code is cheaper.
Scores updated · 35 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 software60GPT-5.6 Sol6 of 6 tests
- ReasoningHard problems that need careful thinking50GPT-5.6 Sol5 of 5 tests
- AgentsCarrying out multi-step tasks on its own40GPT-5.6 Sol4 of 4 tests
- MathCompetition and research-level math30GPT-5.6 Sol3 of 3 tests
- Following instructionsDoing exactly what it is asked20GPT-5.6 Sol2 of 2 tests
- FactsGetting facts right instead of making them up21GPT-5.6 Sol2 of 3 tests
- Long documentsFinding answers in very long texts10GPT-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.
Kimi K2.7 Code costs 79% 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+70.8points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+38.9points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+35.1points ahead
Where Kimi K2.7 Code pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+9.8points ahead
Every test, side by side
All 35 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 21.265.944.7+21.2
- Terminal-Bench 2.1GPT-5.6 Sol by 20.68867.4+20.6
- LMArena · WebDevGPT-5.6 Sol by 145 rating points16181473+145 rating
- LiveBench · Agentic CodingGPT-5.6 Sol by 10.556.245.7+10.5
- LiveBench · CodingGPT-5.6 Sol by 9.983.974+9.9
- SciCodeGPT-5.6 Sol by 9.357.147.8+9.3
AgentsGPT-5.6 Sol
- Terminal-Bench 4.0GPT-5.6 Sol by 38.939.91+38.9
- GDPValGPT-5.6 Sol by 28.655.627+28.6
- τ-Bench V3 · BankingGPT-5.6 Sol by 24.144.320.2+24.1
- MCP AtlasGPT-5.6 Sol by 7.683.676+7.6
ReasoningGPT-5.6 Sol
- CritPtGPT-5.6 Sol by 22.332.310+22.3
- Humanity's Last ExamGPT-5.6 Sol by 14.549.535+14.5
- LiveBench · ReasoningGPT-5.6 Sol by 8.991.782.8+8.9
- SimpleBenchGPT-5.6 Sol by 6.964.857.9+6.9
- GPQA DiamondGPT-5.6 Sol by 4.594.189.6+4.5
FactsGPT-5.6 Sol
- SimpleQA VerifiedGPT-5.6 Sol by 33.269.736.5+33.2
- AA-Omniscience · AccuracyGPT-5.6 Sol by 19.859.439.6+19.8
- AA-Omniscience · Non-hallucinationKimi K2.7 Code by 9.87.817.6+9.8
MathGPT-5.6 Sol
- FrontierMath Tier 4GPT-5.6 Sol by 70.88312.2+70.8
- FrontierMath Tiers 1-3 (v2)GPT-5.6 Sol by 35.189.154+35.1
- LiveBench · MathematicsGPT-5.6 Sol by 16.696.279.6+16.6
Following instructionsGPT-5.6 Sol
- LiveBench · Instruction FollowingGPT-5.6 Sol by 15.671.856.3+15.6
- IFBenchGPT-5.6 Sol by 9.672.763.1+9.6
Other results11 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.
- DeepSWE 1.1GPT-5.6 Sol by 427331+42
- AA-OmniscienceGPT-5.6 Sol by 32.222-10.2+32.2
- Program BenchKimi K2.7 Code by 28.62553.6+28.6
- AA Agentic IndexGPT-5.6 Sol by 2850.522.5+28
- AA IntelligenceGPT-5.6 Sol by 21.24725.8+21.2
- livebench_data_analysisGPT-5.6 Sol by 17.179.862.7+17.1
- Artificial Analysis Coding IndexGPT-5.6 Sol by 16.677.460.8+16.6
- MCP Mark VerifiedGPT-5.6 Sol by 11.892.981.1+11.8
- MLS Bench Litelower is betterKimi K2.7 Code by 11.146.235.1+11.1
- livebench_languageGPT-5.6 Sol by 9.887.777.9+9.8
- τ²-Bench Telecom (AA run)Kimi K2.7 Code by 585.190.1+5
Questions people ask
Which is better, GPT-5.6 Sol or Kimi K2.7 Code?
GPT-5.6 Sol wins all seven areas where both have results: coding, agents, reasoning, facts, math, long documents and following instructions. Kimi K2.7 Code wins none, but costs 79% less.
Which is better for coding?
GPT-5.6 Sol. It wins 6 of the 6 coding tests both models report; Kimi K2.7 Code wins none.
Which is cheaper?
GPT-5.6 Sol costs $4.00 per million input tokens and $20.00 per million output tokens; Kimi K2.7 Code costs $0.95 and $4.00. That makes Kimi K2.7 Code about 79% cheaper for the same work.
How do you compare the two?
We use the 35 benchmark tests both models have published scores on. The verdict counts the 24 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 11 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.