GPT-5.4 Pro vs Kimi K3.1 Pro
Full profiles: GPT-5.4 Pro (OpenAI) and Kimi K3.1 Pro (Moonshot AI): every benchmark, price and rank.
Updated · Data from 6 sources
As of 24 Oct 2026, GPT-5.4 Pro and Kimi K3.1 Pro are neck and neck on quality (63.3 vs 66.8 on the BenchLeader Index, inside the ±7.1 margin of error), and Kimi K3.1 Pro costs 17× less, which makes it the better buy for most workloads. Pick GPT-5.4 Pro for multimodal (70 vs 67); pick Kimi K3.1 Pro for reasoning (81 vs 73).
GPT-5.4 Pro benchmarks 
Kimi K3.1 Pro benchmarks Which to pick for…
The pick's numbers come first. Category scores on the BenchLeader scale (50 is the average model, 15 points one standard deviation). High confidence means a lead of half a standard deviation or more; under one point is called either.
| Use case | Pick | Why | Confidence |
|---|---|---|---|
| Reasoning | Kimi K3.1 Pro | 81 vs 73 category score | High |
| Knowledge | Kimi K3.1 Pro | 75 vs 74 category score | Medium |
| Images and other media | GPT-5.4 Pro | 70 vs 67 category score | Medium |
| Lowest cost | Kimi K3.1 Pro | $4.00 vs $67.50 per 1M blended; agentic coding session $0.160 vs $2.52 | – |
| Fastest first answer | GPT-5.4 Pro | 6.1 s (GPT-5.4 Pro) vs 27.7 s (Kimi K3.1 Pro) to the first answer token | – |
| High volume on a budget | Neither flagship | A smaller model is usually the better fit: Cheapest good LLMs, Fastest LLMs | – |
Key differences
- GPT-5.4 Pro and Kimi K3.1 Pro are neck and neck on quality (63.3 vs 66.8, within the ±7.1 margin).
- GPT-5.4 Pro is stronger in instruction following, multimodal.
- Kimi K3.1 Pro is stronger in knowledge, reasoning, agents & tools, composite, long context.
- Kimi K3.1 Pro is 17× cheaper ($4.00 vs $67.50 per 1M blended).
- Kimi K3.1 Pro streams 11.5× faster (81 vs 7 tokens per second).
At a glance
| Spec | GPT-5.4 Pro | Kimi K3.1 Pro |
|---|---|---|
| Developer | OpenAI | Moonshot AI |
| Released | 4 Mar 2026 | 23 Oct 2026 |
| Context window (tokens) | 1,050,000 | 1,048,576 |
| Compared at | GPT-5.4 Pro | Kimi K3.1 Pro |
| Open weights | No | No |
| Price in / out / cached input per 1M | $30.00 / $180.00 / – | $2.00 / $10.00 / $0.200 |
Category by category
Category scores on the BenchLeader scale: 50 is the average evaluated model, 15 points is one standard deviation. A gap under one point is called level.
| Category | GPT-5.4 Pro | Kimi K3.1 Pro | Leader |
|---|---|---|---|
| Reasoning | 72.5 | 81.3 | Kimi K3.1 Pro |
| Agents & tools | – | 67.3 | not comparable |
| Knowledge | 73.6 | 74.8 | Kimi K3.1 Pro |
| Instruction following | 63.8 | – | not comparable |
| Multimodal | 69.8 | 67.0 | GPT-5.4 Pro |
| Long context | – | 68.3 | not comparable |
| Composite | – | 75.8 | not comparable |
Where sources disagree
Across the 0 benchmarks both have, GPT-5.4 Pro leads 0, Kimi K3.1 Pro leads 0.
| Overall index | GPT-5.4 Pro | Kimi K3.1 Pro | Leader |
|---|---|---|---|
| BenchLeader Index | 63.3 | 66.8 | neck and neck |
Each publisher runs its own tasks, harnesses and effort settings, so their overall verdicts can differ; BenchLeader reconciles them on one scale. † measured at another effort setting of the same model (the publisher did not test the one compared here).
Price, speed and latency
List prices blended at three input tokens per output token. Per-task prices use the token counts on the methodology page; suite cost is what Artificial Analysis paid to run its whole Intelligence Index.
| Measure | GPT-5.4 Pro | Kimi K3.1 Pro |
|---|---|---|
| Blended price per 1M tokens | $67.50 | $4.00 |
| Input / output per 1M | $30.00 / $180.00 | $2.00 / $10.00 |
| Cached input per 1M | – | $0.200 |
| Price per task: chat reply | $0.066 | $0.0038 |
| Price per task: summarize a 30-page report | $0.468 | $0.030 |
| Price per task: code edit | $0.450 | $0.027 |
| Price per task: agentic coding session | $2.52 | $0.160 |
| Price per task: structured extraction | $0.096 | $0.0060 |
| Cost to run a full benchmark suite | – | $2.11 |
| Output speed | 7 tok/s | 81 tok/s |
| Time to first answer | 6.1 s | 27.7 s |
| Time to a complete answer | – | 33.9 s |
Each model is compared at its best-ranked reasoning-effort setting. GPT-5.4 Pro scores 63.3 and takes 6 s to its first answer token; GPT-5.4 Pro (xhigh) scores 61.9 in 6 s. Kimi K3.1 Pro scores 66.8 and takes 28 s to its first answer token. Higher effort means more thinking before the answer: better scores, longer waits and more tokens billed. How reasoning effort changes scores and cost.
Every benchmark
45 benchmarks, grouped by category; each name links to the board and its leaders. † measured at another effort setting of the same model, shown for reference and not counted as a win.
| Metric | Publisher | GPT-5.4 Pro | Kimi K3.1 Pro |
|---|---|---|---|
| BenchLeader Index | BenchLeader | 63.3 | 66.8 |
| Instruction following score | BenchLeader | 63.8 | – |
| Knowledge score | BenchLeader | 73.6 | 74.8 |
| Multimodal score | BenchLeader | 69.8 | 67.0 |
| Reasoning score | BenchLeader | 72.5 | 81.3 |
| Agents & tools score | BenchLeader | – | 67.3 |
| Composite score | BenchLeader | – | 75.8 |
| Long context score | BenchLeader | – | 68.3 |
| Blended price $/M | BenchLeader | $67.50 | $4.00 |
| Output speed | BenchLeader | 7 tok/s | 81 tok/s |
| Time to first answer | BenchLeader | 6.1 s | 27.7 s |
| Context window | BenchLeader | 1,050,000 tokens | 1,048,576 tokens |
| Reasoning | |||
| GPQA Diamond | Epoch AI Benchmarking Hub | 94.6%† | – |
| Humanity's Last Exam | Scale AI / CAIS | 44.3% | – |
| SimpleBench | SimpleBench | 74.1% | – |
| LiveBench 2.0 Reasoning | LiveBench | – | 91.1% |
| Humanity's Last Exam (AA) | Artificial Analysis | – | 52.5% |
| ARC-AGI-1 | ARC Prize | 94.5%† | – |
| ARC-AGI-2 | ARC Prize | 83.3%† | – |
| CritPt | Artificial Analysis | 30.0%† | 24.6% |
| Chess Puzzles | Epoch AI Benchmarking Hub | 59.0%† | – |
| Coding | |||
| WeirdML | WeirdML | 57.4%† | – |
| LiveBench 2.0 Coding | LiveBench | – | 81.8% |
| SciCode (AA) | Artificial Analysis | – | 60.8% |
| Terminal-Bench 4.0 (AA) | Artificial Analysis | – | 67.2% |
| FrontierCode 1.1 (AA) | Artificial Analysis | – | 47.1% |
| Agents & tools | |||
| LiveBench Long Agentic | LiveBench | – | 49.5% |
| LiveBench Browser | LiveBench | – | 80.0% |
| GDPval-AA v2.1 | Artificial Analysis | – | 67.3% |
| AutomationBench | Artificial Analysis | – | 73.3% |
| GDP.pdf (AA) | Artificial Analysis | – | 31.4% |
| AA-Briefcase v1.1 | Artificial Analysis | – | 1678 |
| CWE-Bench (AA) | Artificial Analysis | – | 60.8% |
| DeepSec-Bench (AA) | Artificial Analysis | – | 36.7% |
| CyberGym end-to-end (AA) | Artificial Analysis | – | 94.7% |
| Maths | |||
| FrontierMath Tiers 1–3 | Epoch AI Benchmarking Hub | 82.5%† | – |
| FrontierMath Tier 4 | Epoch AI Benchmarking Hub | 58.5%† | – |
Show all 45 benchmarks
| Metric | Publisher | GPT-5.4 Pro | Kimi K3.1 Pro |
|---|---|---|---|
| Maths | |||
| MathArena Apex | MathArena | 69.8%† | – |
| Knowledge | |||
| SimpleQA Verified | Epoch AI Benchmarking Hub | 46.3%† | – |
| LiveBench 2.0 Data Analysis | LiveBench | – | 79.1% |
| LiveBench Research | LiveBench | – | 77.9% |
| AA-Omniscience | Artificial Analysis | – | 29.5 |
| MultiNRC | Scale AI SEAL | 62.3% | – |
| AA-Omniscience: accuracy | Artificial Analysis | – | 51.0% |
| AA-Omniscience: non-hallucination | Artificial Analysis | – | 56.1% |
| Instruction following | |||
| MultiChallenge | Scale AI SEAL | 69.2% | – |
| TutorBench | Scale AI SEAL | 56.6% | – |
| Multimodal | |||
| LiveBench Design | LiveBench | – | 77.8% |
| MMMU-Pro | Artificial Analysis | – | 83.9% |
| VISTA | Scale AI SEAL | 53.9% | – |
| Long context | |||
| AA-LCR | Artificial Analysis | – | 86.3% |
| Composite | |||
| Epoch Capabilities Index | Epoch AI Benchmarking Hub | 159.6 | – |
| LiveBench 2.0 | LiveBench | – | 76.7% |
| AA Intelligence Index v4.3.2 | Artificial Analysis | – | 55.1 |
| AA Cyber Index | Artificial Analysis | – | 64.1 |
| Safety & honesty | |||
| FORTRESS | Scale AI SEAL | 14.8% | – |
| MASK | Scale AI SEAL | 91.7% | – |
Data as of 2026-10-24. Best configuration of each model; every score links to its source on the model pages.
What changed
- Kimi K3.1 Pro: BenchLeader Index 65.6 → 66.8.
- Kimi K3.1 Pro: 5 new results (FrontierCode 1.1 (AA), AA Cyber Index, CWE-Bench (AA)…).
- Kimi K3.1 Pro: first results.
- GPT-5.4 Pro: 1 score revision.
- GPT-5.4 Pro: BenchLeader Index 62.1 → 63.6.
- GPT-5.4 Pro: 1 new result (MultiNRC).
- GPT-5.4 Pro: BenchLeader Index 64.0 → 62.1.
- GPT-5.4 Pro: BenchLeader Index 63.4 → 64.0.
- GPT-5.4 Pro: 1 new result (TutorBench).
- GPT-5.4 Pro: BenchLeader Index 64.0 → 63.4.
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Rankings: Best LLM overall · Best LLM for agents · Best cheap LLMs
GPT-5.4 Pro vs Kimi K3.1 Pro: questions
- Is GPT-5.4 Pro better than Kimi K3.1 Pro?
- GPT-5.4 Pro and Kimi K3.1 Pro are neck and neck on quality (63.3 vs 66.8, within the ±7.1 margin). The BenchLeader Index combines every independent quality benchmark; the two are within the margin of error as of 2026-10-24, so check the category scores for your use.
- Which is cheaper, GPT-5.4 Pro or Kimi K3.1 Pro, and will that change?
- Kimi K3.1 Pro is cheaper today: $4.00 against $67.50 per million tokens, blended at three input tokens per output token. No price change has been announced for either.
- Which is better for long documents?
- Both take about 1.1M tokens: GPT-5.4 Pro 1,050,000, Kimi K3.1 Pro 1,048,576.
- Which has lower latency?
- GPT-5.4 Pro answers first: 6.1 s against 27.7 s to the first answer token, as Artificial Analysis measures it. Reasoning effort drives most of this: a higher setting thinks longer before it answers.
- Which is faster, GPT-5.4 Pro or Kimi K3.1 Pro?
- Kimi K3.1 Pro streams faster: 81 against 7 output tokens per second.
- When was Kimi K3.1 Pro released?
- Kimi K3.1 Pro was released on 23 Oct 2026.