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Head-to-head comparison

Claude Fable 5 vs Kimi K2 Thinking

Claude Fable 5 (Anthropic) and Kimi K2 Thinking (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 18 August 2026

As of 18 August 2026, Claude Fable 5 holds the stronger ModelCap Index position (#1 vs #32); Kimi K2 Thinking is 20× cheaper per output token ($2.50/1M vs $50.00/1M); and Claude Fable 5 offers the longer context window (1M vs 262K tokens).

Which should you choose?

Choose Claude Fable 5 if…

  • you want the stronger overall ModelCap Index position — #1 against #32 (84.2 vs 58.5 points).
  • you need the longer context window — 1M tokens against 262K.
  • you want provider choice — 5 listed API providers against 2.
  • Arena coding is your yardstick — 1554 against 1486.
  • Artificial Analysis Intelligence Index is your yardstick — 62.1 against 33.5.
  • you want the more recently listed model — Claude Fable 5 was listed 9 June 2026, Kimi K2 Thinking 6 November 2025.

Choose Kimi K2 Thinking if…

  • API cost matters — $2.50/1M output tokens against $50.00/1M, about 20× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.60/1M against $10.00/1M.

Claude Fable 5 vs Kimi K2 Thinking: specs, pricing and context

Specification comparison of Claude Fable 5 and Kimi K2 Thinking
FieldClaude Fable 5AnthropicKimi K2 ThinkingMoonshot AI
ModelCap Index position#1#32
Index score84.258.5
EvidenceMeasuredMeasured
Input price / 1M tokens$10.00$0.60
Output price / 1M tokens$50.00$2.50
Context window1M tokens262K tokens
Max output tokens128K100K
API providers listed52
Weight accessAPI onlyRestricted license
Input modalitiesText, Image, FileText
First listed9 June 20266 November 2025
PublisherAnthropicMoonshot AI

Evidence: 7 public benchmark observations across 7 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 vs Kimi K2 Thinking

Public benchmark boards where Claude Fable 5 or Kimi K2 Thinking has a published result
BoardClaude Fable 5Kimi K2 ThinkingLeads
Arena codingArena (LMArena)15541546–156314861481–1492TurboClaude Fable 5
LMArena AgentLMArena12.0%9.4%–14.6%High—Only one result
ARC-AGI-2ARC Prize Foundation89.2%Max—Only one result
SWE-benchSWE-bench (Princeton / SWE-agent team)—63.4%ThinkingOnly one result
Terminal-Bench 2.1 Terminus 2Terminal-Bench80.4High—Only one result
WildClawBench OpenClawWildClawBench62.0—Only one result
Artificial Analysis Intelligence IndexArtificial Analysis62.1intelligence-index33.5intelligence-indexClaude Fable 5

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 vs Kimi K2 Thinking: common questions

Is Claude Fable 5 better than Kimi K2 Thinking?

Claude Fable 5 ranks higher on the ModelCap Index as of 18 August 2026: #1 against #32. 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 cheaper than Kimi K2 Thinking?

Kimi K2 Thinking is cheaper on output tokens: $2.50/1M against $50.00/1M. Input tokens are $10.00/1M for Claude Fable 5 and $0.60/1M for Kimi K2 Thinking. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Claude Fable 5 or Kimi K2 Thinking?

Claude Fable 5 has the larger context window: 1M tokens against 262K.

Which is better for coding, Claude Fable 5 or Kimi K2 Thinking?

Arena coding: Claude Fable 5 1554, Kimi K2 Thinking 1486 — Claude Fable 5 leads.

Are Claude Fable 5 and Kimi K2 Thinking open-weight models?

Claude Fable 5: API only. Kimi K2 Thinking: 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 and Kimi K2 Thinking?

ModelCap currently lists 5 API providers for Claude Fable 5 and 2 for Kimi K2 Thinking, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Claude Fable 5 vs Kimi K2 Thinking comparison?

Every figure comes from the sealed ModelCap dataset published 18 August 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.

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