Claude Opus 5 vs Kimi K3
Market Position
LiveBench Quality Versus Estimated Output Cost
This current-market view appears only when both compared models are reviewed current models with publisher-reported LiveBench token accounting and current sourced USD output rates.
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | Claude Opus 5 | Kimi-K3 |
|---|---|---|
| IntelligenceHigher is better · MM Intelligence v1.2 | #2 of 2294.1 score | #11 of 2271.3 score |
| CostLower is better · Published-token output estimate | #33 of 36$0.371 per LiveBench case | #24 of 36$0.194 per LiveBench case |
| EfficiencyHigher is better · MM Efficiency v1.0 | #7 of 2256.8 score | #13 of 2251.7 score |
Ranks come from the current complete eligible cohorts. Green highlights appear only when both models are ranked in the same metric. Missing required inputs remain unranked, and the three dimensions are not collapsed into an overall winner.
Benchmark Performance
Available Benchmarks
| Benchmark | Claude Opus 5 | Kimi-K3 |
|---|---|---|
| ARC-AGI-1verified-v1-2aa739d957fc · verified_score · leader | 97.50100% of row best · percent · Claude Opus 5 (Max) | 94.5097% of row best · percent · Kimi K3 (Max) |
| ARC-AGI-2verified-v2-b5cb5ec6e8c7 · verified_score · leader | 90.42100% of row best · percent · Claude Opus 5 (Max) | 60.4267% of row best · percent · Kimi K3 (Max) |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,504.96100% of row best · rating · claude-opus-5-max; 95% CI [1499.16488972, 1510.76500615]; votes 16839; rank 1 | 1,476.3198% of row best · rating · kimi-k3-max; 95% CI [1470.86166728, 1481.76254962]; votes 17895; rank 16 |
| LiveBench2026-06-25 · overall · leader | 83.44100% of row best · percent · claude-opus-5-max-effort · 14,826 output tokens / case | 81.0297% of row best · percent · kimi-k3 · 13,647 output tokens / case |
| ToneBench2026-08-28-10-task-cd9819ab6e4d · overall_score · leader | 88.76100% of row best · points · Claude Opus 5 (max effort) · 2,628 output tokens / case | 88.1999% of row best · points · Kimi K3 · 15,023 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above | 5 benchmark winsOverall lead | 0 benchmark wins |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Technical Differences
Side-by-Side Facts
| Field | Claude Opus 5 | Kimi-K3 |
|---|---|---|
| Developer | Anthropic | Moonshot AI |
| Family | Claude 5 | Kimi K3 |
| Model | Claude Opus 5 | Kimi-K3 |
| Version | Claude Opus 5 | Kimi-K3 |
| Lifecycle | active | active |
| Released | 2026-07-24 | 2026-07-16 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,000K | 1,049K |
| Total parameters | Unknown | 2.8T |
| Active parameters | Unknown | 104B |
| License | Unknown | other |
| Open weights | No | Yes |
| API available | Yes | Yes |
| Self-hostable | No | Yes |
| Provider access | Anthropic (Standard), Deepinfra (Standard), Openrouter (Standard) | Deepinfra (Standard), Fireworks Ai (Standard), Hugging Face (Standard), Openrouter (Standard), Together Ai (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning |
14 comparable fields · 10 material differences · Pair passes the primary-source comparison gate
Claude Opus 5 Capabilities
Kimi K3 Capabilities
Internal Comparison Graph
Related Comparisons
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|---|---|---|---|
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Claude Opus 5Anthropic | vs |  Hy4 previewTencent | cross-developer peerstext |
Claude Opus 5Anthropic | vs | Seed 2.1 ProByteDance Seed | cross-developer peersimage, text |
Claude Opus 5Anthropic | vs |  Mistral Large 3Mistral AI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Opus 5 vs Kimi K3 FAQs
Is Claude Opus 5 or Kimi K3 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Opus 5 and Kimi K3, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Opus 5 or Kimi K3?+
Claude Opus 5 is $5.00 and Kimi K3 is $2.85 per million tokens, so Kimi K3 is cheaper on this metric. Claude Opus 5 is $25.00 and Kimi K3 is $14.25 per million tokens, so Kimi K3 is cheaper on this metric.
Which has a larger context window, Claude Opus 5 or Kimi K3?+
Kimi K3 has the larger sourced context window. Claude Opus 5 supports 1,000K and Kimi K3 supports 1,049K.
Which performs better in benchmarks, Claude Opus 5 or Kimi K3?+
Claude Opus 5 leads the current overall benchmark count. The result uses 5 protocol-matched benchmarks from 4 publishers; it is not a universal quality score.
Can Claude Opus 5 or Kimi K3 be self-hosted?+
Kimi K3 is the only model in this pair currently marked as self-hostable. Claude Opus 5 is not marked open weight; Kimi K3 is open weight.
Can Claude Opus 5 and Kimi K3 understand images?+
Claude Opus 5 is documented with image input; Kimi K3 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Opus 5 or Kimi K3?+
Neither has a larger sourced maximum output. Claude Opus 5 is 128K and Kimi K3 is —.
Do Claude Opus 5 and Kimi K3 support reasoning and tool use?+
Claude Opus 5: reasoning, tool calling, and image input. Kimi K3: reasoning and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Opus 5 or Kimi K3?+
Claude Opus 5 has 3 sourced provider routes; Kimi K3 has 5, so Kimi K3 has broader tracked availability.
Which offers better value, Claude Opus 5 or Kimi K3?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.