Claude Fable 5.1 vs Kimi-K3
Why this pair: Current Anthropic and Moonshot AI frontier models
Benchmark Performance
Available Benchmarks
Technical Differences
Side-by-Side Facts
| Field | Claude Fable 5.1 | Kimi-K3 |
|---|---|---|
| Developer | Anthropic | Moonshot AI |
| Family | Claude 5 1 | Kimi K3 |
| Model | Claude Fable 5.1 | Kimi-K3 |
| Version | Claude Fable 5.1 | Kimi-K3 |
| Lifecycle | active | active |
| Released | 2026-09-01 | 2026-07-16 |
| Knowledge cutoff | 2026-06-01 | Unknown |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,000,000 | 1,048,576 |
| Total parameters | Unknown | 2,779,931,837,184 |
| Active parameters | Unknown | 104,000,000,000 |
| License | Unknown | other |
| Open weights | No | Yes |
| API available | Yes | Yes |
| Self-hostable | No | Yes |
| Provider access | Unknown | Deepinfra (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning |
13 comparable fields · 9 material differences · Editorially curated pair passes the primary-source comparison gate
Claude Fable 5.1 Capabilities
Kimi-K3 Capabilities
Internal Comparison Graph
Related Comparisons
| A | Pair | B | Context |
|---|---|---|---|
Claude Fable 5Anthropic | vs | Claude Fable 5.1Anthropic | family variantsimage, text |
Claude Fable 5.1Anthropic | vs | Claude Opus 5Anthropic | family variantsimage, text |
Claude Fable 5.1Anthropic | vs | Claude Sonnet 5Anthropic | family variantsimage, text |
Claude Fable 5.1Anthropic | vs |  GPT-5.6 SolOpenAI | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs |  Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
Claude Fable 5.1Anthropic | vs | Grok 4.6xAI | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs |  DeepSeek-V4-Flash-Vision-ExpDeepSeek | cross-developer peersimage, text |
Claude Mythos 5.1Anthropic | vs | Kimi-K3Moonshot AI | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs |  Hy4 previewTencent | cross-developer peerstext |
Kimi-K3Moonshot AI | vs | Hy4 previewTencent | cross-developer peerstext |
Kimi-K2.5Moonshot AI | vs | Kimi-K3Moonshot AI | family variantsembedding, image, text |
Kimi-K2.6Moonshot AI | vs | Kimi-K3Moonshot AI | family variantsembedding, image, text |
Primary Evidence
Sources and Freshness
Questions
Claude Fable 5.1 vs Kimi-K3 FAQs
Is Claude Fable 5.1 or Kimi-K3 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Fable 5.1 and Kimi-K3, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Fable 5.1 or Kimi-K3?+
Only Kimi-K3 has a directly sourced input price: $2.85 per million tokens. Only Kimi-K3 has a directly sourced output price: $14.25 per million tokens.
Which has a larger context window, Claude Fable 5.1 or Kimi-K3?+
Kimi-K3 has the larger sourced context window. Claude Fable 5.1 supports 1,000,000 and Kimi-K3 supports 1,048,576.
Which performs better in benchmarks, Claude Fable 5.1 or Kimi-K3?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Claude Fable 5.1 or Kimi-K3 be self-hosted?+
Kimi-K3 is the only model in this pair currently marked as self-hostable. Claude Fable 5.1 is not marked open weight; Kimi-K3 is open weight.
Can Claude Fable 5.1 and Kimi-K3 understand images?+
Claude Fable 5.1 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 Fable 5.1 or Kimi-K3?+
Neither has a larger sourced maximum output. Claude Fable 5.1 is 128,000 and Kimi-K3 is —.
Do Claude Fable 5.1 and Kimi-K3 support reasoning and tool use?+
Claude Fable 5.1: 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 Fable 5.1 or Kimi-K3?+
Claude Fable 5.1 has 0 sourced provider routes; Kimi-K3 has 2, so Kimi-K3 has broader tracked availability.
Which offers better value, Claude Fable 5.1 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.