WhichAI.todayClaude Fable 5.1
Anthropic
Pick this when analyzing high-stakes contracts, filings, and long transcripts.
Do not treat it as legal advice, or as a substitute for reading the clause yourself.
Vals LegalBench 88.5% (top 2 of 150+ models)
Claude Fable 5.1 vs Kimi K3
Updated Nov 13, 2026. Checked daily.
The short answer
Claude Fable 5.1 ranks ahead for legal & long documents. Kimi K3 ranks ahead for coding & software.
Claude Fable 5.1
1 of 2 jobs ahead
Paid plan
Kimi K3
1 of 2 jobs ahead
Free (limited)
Head to head, job by job
Each job ranks a #1, an alternative, and an open-weights pick from public leaderboards. Bars compare the two scores on that job's own signal.
Which one should you pick?
Kimi K3
Moonshot AI
Pick this when the code cannot leave your own machines.
Skip self-hosting if you lack multi-GPU cluster infrastructure required to serve 2.8 trillion parameters.
88.2% on SWE-bench Pro V2 HARD
Price, access, and privacy
Claude Fable 5.1Kimi K3
Cost
Pro is $20/month. Fable draws on usage credits. API is $10 per million input tokens and $50 per million output.
Free to download weights; hosted Kimi app is free with usage limits or available via API.
Free tier
Not on the free plan. Fable needs Pro or higher.
Yes, available for free with standard rate limits in the Kimi web and mobile apps.
Where to get it
Apps
- Claude, Pro ($20/month)
- Perplexity, Max ($200/month)
- Cursor, Premium ($30/month)
- GitHub Copilot, Copilot Pro ($10/month)
- Claude Code, Max ($100/month)
- Perplexity, Pro ($20/month)
- Cursor, Premium ($30/month)
- GitHub Copilot, Copilot Pro ($10/month)
- Hugging Face, Free (Free)
- Ollama, Pro ($20/month)
Trains on chats
Anthropic says Free, Pro, and Max chats are used for training only if you allow it, and you choose at signup. The toggle has been reported as on by default, so check it. Settings, then Privacy. Turn off Help improve Claude.
Yes. The Kimi consumer policy says prompts and files can be used to improve models. Ask Kimi support to stop training use if the app has no toggle.
Released
Before our release log began.
Before our release log began.
Try both with the same prompt
Claude Fable 5.1
Summarize the obligations, deadlines, and unusual clauses in this contract.
Kimi K3
Refactor this module for clarity and add tests for the edge cases.
Want a sharper prompt? Build one for either model.
Ranking history
- Oct 23, 2026. Claude Fable 5.1 is the first leader on record. Vals LegalBench 88.5% (top 2 of 150+ models)
Questions
Is Claude Fable 5.1 or Kimi K3 better for coding & software?
Kimi K3 ranks ahead for coding & software on LMArena Code. Claude Fable 5.1 is not in today's top three; Kimi K3 is the open weights pick.
Is Claude Fable 5.1 or Kimi K3 better for legal & long documents?
Claude Fable 5.1 ranks ahead for legal & long documents on Vals LegalBench. Claude Fable 5.1 is the #1 pick (88.5); Kimi K3 is the open weights pick (86.2).
Which is cheaper, Claude Fable 5.1 or Kimi K3?
Claude Fable 5.1: Pro is $20/month. Fable draws on usage credits. API is $10 per million input tokens and $50 per million output. Kimi K3: Free to download weights; hosted Kimi app is free with usage limits or available via API.
Can I use Claude Fable 5.1 or Kimi K3 for free?
Claude Fable 5.1: Not on the free plan. Fable needs Pro or higher. Kimi K3: Yes, available for free with standard rate limits in the Kimi web and mobile apps.
Which is more private, Claude Fable 5.1 or Kimi K3?
Claude Fable 5.1 (Anthropic): Anthropic says Free, Pro, and Max chats are used for training only if you allow it, and you choose at signup. The toggle has been reported as on by default, so check it. Kimi K3 (Moonshot AI): Yes. The Kimi consumer policy says prompts and files can be used to improve models.