Model comparison
GPT-5.4 nano vs Kimi K2.6
Head-to-head evidence from 29 shared benchmark results across 7 categories. Overall scores shown here use BenchLM's provisional ranking lane.
Verified leaderboard positions: GPT-5.4 nano unranked; Kimi K2.6 #13
Evidence parity. GPT-5.4 nano and Kimi K2.6 share 29 comparable benchmark results. 4 of 8 categories are comparable. 1 result is unique to GPT-5.4 nano; 31 to Kimi K2.6.
Updated July 13, 2026- Shared results
- 29
- GPT-5.4 nano only
- 1
- Kimi K2.6 only
- 31
- Comparable categories
- 4 / 8
Pick Kimi K2.6 if you want the stronger benchmark profile. GPT-5.4 nano only becomes the better choice if knowledge is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 29 shared benchmark results across 7 evidence categories; 4 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Kimi K2.6 is clearly ahead on the provisional aggregate, 74 to 61. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Kimi K2.6's sharpest advantage is in mathematics, where it averages 67.1 against 21. The single biggest benchmark swing on the page is OSWorld-Verified, 39% to 73.1%. GPT-5.4 nano does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.
Kimi K2.6 is also the more expensive model on tokens at $0.95 input / $4.00 output per 1M tokens, versus $0.20 input / $1.25 output per 1M tokens for GPT-5.4 nano. That is roughly 3.2x on output cost alone. GPT-5.4 nano gives you the larger context window at 400K, compared with 256K for Kimi K2.6.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | GPT-5.4 nano | Δ | Kimi K2.6 |
|---|---|---|---|
| Math | GPT-5.4 nano21.0 | Margin→ 46.1 | Kimi K2.667.1 |
| Agentic | GPT-5.4 nano42.9 | Margin→ 30.6 | Kimi K2.673.5 |
| Multimodal | GPT-5.4 nano66.1 | Margin→ 13.7 | Kimi K2.679.8 |
| Knowledge | GPT-5.4 nano43.8 | Margin← 1.6 | Kimi K2.642.2 |
| Coding | GPT-5.4 nanoNot measured | MarginNo overlap | Kimi K2.672.6 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
OSWorld-Verified
AgenticA 39%B 73.1%Winner: Kimi K2.6Δ 34.1OSWorld-Verified: GPT-5.4 nano scored 39%; Kimi K2.6 scored 73.1%. Kimi K2.6 wins this benchmark. - Source ↗
Terminal-Bench 2.0
AgenticA 46.3%B 66.7%Winner: Kimi K2.6Δ 20.4Terminal-Bench 2.0: GPT-5.4 nano scored 46.3%; Kimi K2.6 scored 66.7%. Kimi K2.6 wins this benchmark. - Source ↗
MMMU-Pro
MultimodalA 66.1%B 79.4%Winner: Kimi K2.6Δ 13.3MMMU-Pro: GPT-5.4 nano scored 66.1%; Kimi K2.6 scored 79.4%. Kimi K2.6 wins this benchmark. - Source ↗
FrontierMath v2 (Tiers 1-3)
MathA 25.860%B 38.966%Winner: Kimi K2.6Δ 13.1FrontierMath v2 (Tiers 1-3): GPT-5.4 nano scored 25.860%; Kimi K2.6 scored 38.966%. Kimi K2.6 wins this benchmark. - Source ↗
FrontierMath v2 (Tier 4)
MathA 6.250%B 14.580%Winner: Kimi K2.6Δ 8.3FrontierMath v2 (Tier 4): GPT-5.4 nano scored 6.250%; Kimi K2.6 scored 14.580%. Kimi K2.6 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-5.4 nano | Kimi K2.6 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.4 nano$0.2 input / $1.25 output | Kimi K2.6$0.95 input / $4 output | GPT-5.4 nano has the lower combined listed price. |
| Generation speedtokens per second | GPT-5.4 nano191 tok/s | Kimi K2.6Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-5.4 nano3.64 s | Kimi K2.6Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-5.4 nano400K | Kimi K2.6256K | GPT-5.4 nano lists the larger context window. |
Benchmark Deep Dive
AgenticKimi K2.6 wins22 benchmarks
| Benchmark | GPT-5.4 nano | Kimi K2.6 | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 46.3% | 66.7% | Kimi K2.6 leads |
| OSWorld-VerifiedSource | 39% | 73.1% | Kimi K2.6 leads |
| MCP AtlasSource | 56.1% | 55.9% | GPT-5.4 nano leads |
| ToolathlonSource | 35.5% | 50% | Kimi K2.6 leads |
| Tau2-TelecomSource | 76% | 95.9% | Kimi K2.6 leads |
| AA Agentic IndexSource | 27.5% | 30.3% | Kimi K2.6 leads |
| APEX-Agents-AASource | 24.9% | 28.5% | Kimi K2.6 leads |
| GDPval-AASource | 30.0% | 34.5% | Kimi K2.6 leads |
| GDPval-AASource | 1101 | 1190 | Kimi K2.6 leads |
| BrowseCompSource | — | 83.2% | Not comparable |
| Claw-EvalSource | — | 62.3% | Not comparable |
| DeepSearchQASource | — | 92.5% | Not comparable |
| WideResearchSource | — | 80.8% | Not comparable |
| Gert LabsSource | — | 56.82% | Not comparable |
| ResearchClawBenchSource | — | 18.0% | Not comparable |
| OSWorld 2.0Source | — | 4.6% | Not comparable |
| AA BriefcaseSource | — | 809 | Not comparable |
| AA AutomationBenchSource | — | 19.6% | Not comparable |
| AA EnterpriseOps-GymSource | — | 38.5% | Not comparable |
| AA Harvey LABSource | — | 0.0% | Not comparable |
| AA ITBenchSource | — | 31.2% | Not comparable |
| AA Tau3 BankingSource | — | 20.6% | Not comparable |
Coding13 benchmarks
| Benchmark | GPT-5.4 nano | Kimi K2.6 | Result |
|---|---|---|---|
| Vibe Code BenchSource | 26.10% | 37.89% | Kimi K2.6 leads |
| AA Coding IndexSource | 56.1% | 61.8% | Kimi K2.6 leads |
| Terminal-Bench HardSource | 42.4% | 43.9% | Kimi K2.6 leads |
| AA-SciCodeSource | 46.9% | 53.5% | Kimi K2.6 leads |
| SWE-bench VerifiedSource | — | 80.2% | Not comparable |
| LiveCodeBenchSource | — | 89.6% | Not comparable |
| LiveCodeBench v6Source | — | 89.6% | Not comparable |
| SWE-bench ProSource | — | 58.6% | Not comparable |
| SWE MultilingualSource | — | 76.7% | Not comparable |
| SciCodeSource | — | 52.2% | Not comparable |
| Terminal-Bench 2.0Source | — | 66.7% | Not comparable |
| cursorBench31Source | — | 47.6% | Not comparable |
| AA Terminal-Bench 2.1Source | — | 65.9% | Not comparable |
Reasoning2 benchmarks
KnowledgeGPT-5.4 nano wins11 benchmarks
| Benchmark | GPT-5.4 nano | Kimi K2.6 | Result |
|---|---|---|---|
| GPQASource | 82.8% | 90.5% | Kimi K2.6 leads |
| HLESource | 37.7% | 34.7% | GPT-5.4 nano leads |
| HLE w/o toolsSource | 24.3% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 38.2% | 44.2% | Kimi K2.6 leads |
| AA-GPQA DiamondSource | 81.7% | 91.1% | Kimi K2.6 leads |
| AA-HLESource | 26.5% | 35.9% | Kimi K2.6 leads |
| AA-Omniscience IndexSource | -29.5% | 6.4% | Kimi K2.6 leads |
| AA-Omniscience AccuracySource | 25.4% | 32.8% | Kimi K2.6 leads |
| AA-Omniscience Hallucination RateSource | 73.6% | 39.3% | Kimi K2.6 leads |
| GPQA-DSource | — | 90.5% | Not comparable |
| AA Openness IndexSource | — | 33.3% | Not comparable |
MathKimi K2.6 wins5 benchmarks
MultimodalKimi K2.6 wins7 benchmarks
| Benchmark | GPT-5.4 nano | Kimi K2.6 | Result |
|---|---|---|---|
| MMMU-ProSource | 66.1% | 79.4% | Kimi K2.6 leads |
| MMMU-Pro w/ PythonSource | 69.5% | 80.1% | Kimi K2.6 leads |
| AA-MMMU-ProSource | 65.4% | 79.4% | Kimi K2.6 leads |
| CharXivSource | — | 80.4% | Not comparable |
| MathVisionSource | — | 87.4% | Not comparable |
| V*Source | — | 96.9% | Not comparable |
| Design Arena WebsiteSource | — | 1318 | Not comparable |
Inst. Following1 benchmarks
| Benchmark | GPT-5.4 nano | Kimi K2.6 | Result |
|---|---|---|---|
| AA-IFBenchSource | 75.9% | 76.0% | Kimi K2.6 leads |
Frequently Asked Questions (5)
Which is better, GPT-5.4 nano or Kimi K2.6?
Kimi K2.6 is ahead on BenchLM's provisional leaderboard, 74 to 61. The biggest single separator in this matchup is OSWorld-Verified, where the scores are 39% and 73.1%.
Which is better for knowledge tasks, GPT-5.4 nano or Kimi K2.6?
GPT-5.4 nano has the edge for knowledge tasks in this comparison, averaging 43.8 versus 42.2. Inside this category, AA-Omniscience Index is the benchmark that creates the most daylight between them.
Which is better for math, GPT-5.4 nano or Kimi K2.6?
Kimi K2.6 has the edge for math in this comparison, averaging 67.1 versus 21. Inside this category, FrontierMath v2 (Tiers 1-3) is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, GPT-5.4 nano or Kimi K2.6?
Kimi K2.6 has the edge for agentic tasks in this comparison, averaging 73.5 versus 42.9. Inside this category, GDPval-AA is the benchmark that creates the most daylight between them.
Which is better for multimodal and grounded tasks, GPT-5.4 nano or Kimi K2.6?
Kimi K2.6 has the edge for multimodal and grounded tasks in this comparison, averaging 79.8 versus 66.1. Inside this category, AA-MMMU-Pro is the benchmark that creates the most daylight between them.
Self-host vs API cost
Estimates at 50,000 req/day · 1000 tokens/req average.
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