Skip to content
ModelCap

Head-to-head comparison

Claude Fable 5.1 vs Kimi K2.7 Code

Claude Fable 5.1 (Anthropic) and Kimi K2.7 Code (Moonshot AI) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 3 September 2026

As of 3 September 2026, Claude Fable 5.1 holds the stronger ModelCap Index position (#2 vs #30); Kimi K2.7 Code is 14.7× cheaper per output token ($3.40/1M vs $50.00/1M); and Claude Fable 5.1 offers the longer context window (1M vs 262K tokens).

Which should you choose?

Choose Claude Fable 5.1 if…

  • you want the stronger overall ModelCap Index position — #2 against #30 (84.1 vs 62.2 points).
  • you need the longer context window — 1M tokens against 262K.
  • AA Intelligence Index is your yardstick — 65.7 against 43.0.
  • AA Terminal-Bench 2.1 is your yardstick — 91.4% against 67.4%.
  • AA Humanity's Last Exam is your yardstick — 59.1% against 35.0%.
  • you want the more recently listed model — Claude Fable 5.1 was listed 1 September 2026, Kimi K2.7 Code 12 June 2026.

Choose Kimi K2.7 Code if…

  • API cost matters — $3.40/1M output tokens against $50.00/1M, about 14.7× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.66/1M against $10.00/1M.
  • you want provider choice — 15 listed API providers against 4.

Claude Fable 5.1 vs Kimi K2.7 Code: specs, pricing and context

Specification comparison of Claude Fable 5.1 and Kimi K2.7 Code
FieldClaude Fable 5.1AnthropicKimi K2.7 CodeMoonshot AI
ModelCap Index position#2#30
Index score84.162.2
EvidenceMeasuredMeasured
Input price / 1M tokens$10.00$0.66
Output price / 1M tokens$50.00$3.40
Context window1M tokens262K tokens
Max output tokens128K236K
API providers listed415
Weight accessAPI onlyRestricted license
Input modalitiesText, Image, FileText, Image
First listed1 September 202612 June 2026
PublisherAnthropicMoonshot AI

Evidence: 2 public benchmark observations across 2 boards · 3 public benchmark observations across 3 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Claude Fable 5.1 vs Kimi K2.7 Code

Public benchmark boards where Claude Fable 5.1 or Kimi K2.7 Code has a published result
BoardClaude Fable 5.1Kimi K2.7 CodeLeads
LMArena AgentLMArena—1.4%-1.1%–3.9%Only one result
ARC-AGI-2ARC Prize Foundation90.0%Max—Only one result
AA Intelligence IndexArtificial Analysis65.7intelligence-index43.0intelligence-indexClaude Fable 5.1
AA Terminal-Bench 2.1Artificial Analysis91.4%terminal-bench-2.167.4%terminal-bench-2.1Claude Fable 5.1
AA τ²-Bench TelecomArtificial Analysis—90.1%tau2-bench-telecomOnly one result
AA Humanity's Last ExamArtificial Analysis59.1%humanitys-last-exam35.0%humanitys-last-examClaude Fable 5.1
WildClawBench OpenClawWildClawBench—46.9Only one result

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Claude Fable 5.1 vs Kimi K2.7 Code: common questions

Is Claude Fable 5.1 better than Kimi K2.7 Code?

Claude Fable 5.1 ranks higher on the ModelCap Index as of 3 September 2026: #2 against #30. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it.

Is Claude Fable 5.1 cheaper than Kimi K2.7 Code?

Kimi K2.7 Code is cheaper on output tokens: $3.40/1M against $50.00/1M. Input tokens are $10.00/1M for Claude Fable 5.1 and $0.66/1M for Kimi K2.7 Code. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Claude Fable 5.1 or Kimi K2.7 Code?

Claude Fable 5.1 has the larger context window: 1M tokens against 262K.

Which is better for coding, Claude Fable 5.1 or Kimi K2.7 Code?

AA Terminal-Bench 2.1: Claude Fable 5.1 91.4%, Kimi K2.7 Code 67.4% — Claude Fable 5.1 leads.

Are Claude Fable 5.1 and Kimi K2.7 Code open-weight models?

Claude Fable 5.1: API only. Kimi K2.7 Code: Restricted license. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Claude Fable 5.1 and Kimi K2.7 Code?

ModelCap currently lists 4 API providers for Claude Fable 5.1 and 15 for Kimi K2.7 Code, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Claude Fable 5.1 vs Kimi K2.7 Code comparison?

Every figure comes from the sealed ModelCap dataset published 3 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

Explore further