GPT-5.2 vs Kimi K2 Thinking
Wins 6 of 7 areas
Coding · Agents · Reasoning · Math · Long documents · Following instructions
Wins 0 of 7 areas
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GPT-5.2 is the stronger all-rounder.Kimi K2 Thinking is cheaper.
Scores updated · 33 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 software40GPT-5.24 of 4 tests
- ReasoningHard problems that need careful thinking40GPT-5.24 of 4 tests
- AgentsCarrying out multi-step tasks on its own20GPT-5.22 of 2 tests
- Long documentsFinding answers in very long texts20GPT-5.22 of 2 tests
- MathCompetition and research-level math10GPT-5.21 of 1 test
- Following instructionsDoing exactly what it is asked10GPT-5.21 of 1 test
- FactsGetting facts right instead of making them up11Even1 each
Math and following instructions rest on a single test each.
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 Thinking costs 80% 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-5.2 pulls ahead
- Finds hard-to-locate facts by browsing the webBrowseComp+24.3points ahead
- Real work tasks from 44 professionsGDPVal+23.8points ahead
- Common-sense trick questionsSimpleBench+19.5points ahead
Where Kimi K2 Thinking pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+5.6points ahead
Every test, side by side
All 33 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.2
- SWE-bench VerifiedGPT-5.2 by 16.68063.4+16.6
- Terminal-Bench HardGPT-5.2 by 15.94731.1+15.9
- SciCodeGPT-5.2 by 9.752.142.4+9.7
- SWE-bench MultilingualGPT-5.2 by 5.666.761.1+5.6
AgentsGPT-5.2
- BrowseCompGPT-5.2 by 24.365.841.5+24.3
- GDPValGPT-5.2 by 23.848.324.5+23.8
ReasoningGPT-5.2
- SimpleBenchGPT-5.2 by 19.545.826.3+19.5
- Humanity's Last ExamGPT-5.2 by 13.937.723.8+13.9
- CritPtGPT-5.2 by 911.62.6+9
- GPQA DiamondGPT-5.2 by 6.590.383.8+6.5
FactsEven
- AA-Omniscience · AccuracyGPT-5.2 by 13.444.330.9+13.4
- AA-Omniscience · Non-hallucinationKimi K2 Thinking by 5.618.824.4+5.6
Long documentsGPT-5.2
- AA-LCRGPT-5.2 by 10.782.772+10.7
- LongBench v2GPT-5.2 by 9.454.545.1+9.4
Other results17 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.
- AA-OmniscienceGPT-5.2 by 20.5-0.9-21.4+20.5
- frontiermath_tier_4_v1GPT-5.2 by 18.818.80+18.8
- Terminal-Bench 2.0GPT-5.2 by 18.35435.7+18.3
- Artificial Analysis Coding IndexGPT-5.2 by 13.948.734.8+13.9
- AA Agentic IndexGPT-5.2 by 12.360.247.9+12.3
- τ²-BenchGPT-5.2 by 11.285.574.3+11.2
- HMMT 2025GPT-5.2 by 1099.489.4+10
- LiveCodeBenchGPT-5.2 by 9.88979.2+9.8
- AA IntelligenceGPT-5.2 by 8.430.422+8.4
- τ²-Bench Telecom (AA run)Kimi K2 Thinking by 8.284.893+8.2
- HMMT Feb. 2025GPT-5.2 by 6.710093.3+6.7
- HMMT Nov. 2025GPT-5.2 by 6.695.889.2+6.6
- swe_bench_bashGPT-5.2 by 5.66963.4+5.6
- AIME 2025GPT-5.2 by 5.510094.5+5.5
- AIME25 no toolsGPT-5.2 by 3.59894.5+3.5
- MMLU-ProGPT-5.2 by 2.186.784.6+2.1
- HLE (with tools)tie45.544.9tie
Questions people ask
Which is better, GPT-5.2 or Kimi K2 Thinking?
GPT-5.2 wins six of the seven areas where both have results: coding, agents, reasoning, math, long documents and following instructions. Kimi K2 Thinking wins none, but costs 80% less. They are level on facts.
Which is better for coding?
GPT-5.2. It wins 4 of the 4 coding tests both models report; Kimi K2 Thinking wins none.
Which is cheaper?
GPT-5.2 costs $1.75 per million input tokens and $14.00 per million output tokens; Kimi K2 Thinking costs $0.60 and $2.50. That makes Kimi K2 Thinking about 80% cheaper for the same work.
How do you compare the two?
We use the 33 benchmark tests both models have published scores on. The verdict counts the 16 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 17 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.