AI Rankings
Claude Opus 4.6 vs Kimi K3: Scores, Price and Which to Choose
Data updated
Read the model pages for the full picture: Claude Opus 4.6 and Kimi K3.
Side by side
- Claude Opus 4.6
- Kimi K3
- Epoch Capabilities IndexToo close to call
Combined score over many tests. Bar shows where it sits between the lowest and highest score we track.
Claude Opus 4.6:155.7Kimi K3:157.9 - Arena text ratingClaude Opus 4.6 leads
Rating from head-to-head votes by people. Bar shows where it sits between the lowest and highest score we track.
Claude Opus 4.6:Better: 1503Kimi K3:1487 - Arena coding ratingToo close to call
Rating from head-to-head votes by people. Bar shows where it sits between the lowest and highest score we track.
Claude Opus 4.6:1547Kimi K3:1539 - Arena web development ratingKimi K3 leads
Rating from head-to-head votes by people. Bar shows where it sits between the lowest and highest score we track.
Claude Opus 4.6:1546Kimi K3:Better: 1655 - ARC-AGI-2Claude Opus 4.6 leads
Visual puzzles where the AI must work out a new rule from a few examples and apply it.
Claude Opus 4.6:Better: 69.2%Kimi K3:60.4% - SimpleBenchClaude Opus 4.6 leads
Everyday common-sense and trick questions that most people answer correctly but AI models often get wrong.
Claude Opus 4.6:Better: 67.6%Kimi K3:60.7% - FrontierMath (Tiers 1-3)Kimi K3 leads
Original, very hard maths problems written by mathematicians.
Claude Opus 4.6:66.0%Kimi K3:Better: 72.2% - GPQA DiamondKimi K3 leads
Very hard multiple-choice science questions in biology, physics and chemistry, written by experts and designed so a quick web search does not give the answer.
Claude Opus 4.6:90.5%Kimi K3:Better: 93.1% - OTIS Mock AIMEKimi K3 leads
Maths competition problems in the style of the US AIME exam, from the 2024 and 2025 sets.
Claude Opus 4.6:94.4%Kimi K3:Better: 97.2% - SimpleQA VerifiedKimi K3 leads
Short factual questions that each have one correct answer.
Claude Opus 4.6:47.0%Kimi K3:Better: 50.6% - Blended price per million tokensKimi K3 costs less
Blended price: lower is better.
Claude Opus 4.6:$10.00Kimi K3:Better: $6.00 - Context windowToo close to call
How much text it can read at once.
Claude Opus 4.6:1M tokensKimi K3:1M tokens
The numbers
| Measure | Claude Opus 4.6 | Kimi K3 |
|---|---|---|
| Epoch Capabilities IndexToo close to call | 155.7 | 157.9 |
| Arena text rating | 1503 | 1487 |
| Arena coding ratingToo close to call | 1547 | 1539 |
| Arena web development rating | 1546 | 1655 |
| ARC-AGI-2 | 69.2% | 60.4% |
| SimpleBench | 67.6% | 60.7% |
| FrontierMath (Tiers 1-3) | 66.0% | 72.2% |
| GPQA Diamond | 90.5% | 93.1% |
| OTIS Mock AIME | 94.4% | 97.2% |
| SimpleQA Verified | 47.0% | 50.6% |
| Blended price per million tokens | $10.00 | $6.00 |
| Context windowToo close to call | 1M tokens | 1M tokens |
What it costs in everyday terms
- 100 chats with Claude Opus 4.6
- $1.75
- Blended price $10.00 per million tokens.
- 100 chats with Kimi K3
- $1.05
- Blended price $6.00 per million tokens.
Who should pick which
Pick Claude Opus 4.6 if these matter most
- Arena text rating: 1503 against 1487
- ARC-AGI-2: 69.2% against 60.4%
- SimpleBench: 67.6% against 60.7%
Pick Kimi K3 if these matter most
- Arena web development rating: 1655 against 1546
- FrontierMath (Tiers 1-3): 72.2% against 66.0%
- GPQA Diamond: 93.1% against 90.5%
- OTIS Mock AIME: 97.2% against 94.4%
- SimpleQA Verified: 50.6% against 47.0%
- Blended price per million tokens: $6.00 against $10.00
Too close to call: Epoch Capabilities Index, Arena coding rating, Context window.
Scores come from tests and votes, not from your own work. Try both on a task you care about before you commit.
Questions about this comparison
- Which is better, Claude Opus 4.6 or Kimi K3?
- Kimi K3 scores higher on 5 of 10 shared quality measures, Claude Opus 4.6 on 3. 2 measures are too close to call. Kimi K3 costs about 40% less than Claude Opus 4.6 on a blended price of $6.00 against $10.00 per million tokens. Which one is better for you depends on your task and budget, so test both on your own work.
- Which is cheaper, Claude Opus 4.6 or Kimi K3?
- Kimi K3 is cheaper on blended price: $10.00 per million tokens for Claude Opus 4.6 against $6.00 for Kimi K3. For 100 chats of about 1,000 tokens in and 500 tokens back, that is about $1.75 for Claude Opus 4.6 and $1.05 for Kimi K3.
- Which is better for coding, Claude Opus 4.6 or Kimi K3?
- On Arena coding rating they are too close to call (1547 and 1539).
Where this data comes from
- Epoch AI: Benchmark data: Epoch AI, 'Capabilities & benchmarking', epoch.ai/benchmarks (CC BY 4.0). We match models across sources, rank them and show them in charts. Scores are not changed. Epoch AI does not endorse this site.
- Arena (formerly LMArena): Human-preference ratings: Arena (arena.ai) leaderboard dataset, CC BY 4.0. We keep the latest published ratings, match them to models from other sources and rank them. Ratings are not changed. Arena does not endorse this site.
- LiteLLM model price list: Prices and context windows: LiteLLM model price list (github.com/BerriAI/litellm, MIT licence). We use the model maker's own price entry when there is one. Prices change often, so always confirm on the maker's site before you buy.
Newest data on this page: 26 Oct 2026. Prices are list prices and change often, so confirm on the maker's site before you buy. Sponsors never change a score or an order. How we calculate this · Report a mistake