token.app › Compare › Claude Opus 5 (Fast) vs Kimi K3

Claude Opus 5 (Fast) vs Kimi K3

Kimi K3 is 3.3× cheaper per token on a blended 3:1 basis. Kimi K3 accepts the larger context window (1.0M).

Head to head
Blended price uses a 3:1 input:output mix
Claude Opus 5 (Fast)Kimi K3
ProviderAnthropicMoonshot AI
Input $/1M$10.00$3.00
Output $/1M$50.00$15.00
Blended $/1M$20.00$6.00
Context window1M1.0M
Max output128K—
ReleasedJul 2026Jul 2026
LicenceProprietaryOpen weights
Choose Claude Opus 5 (Fast) if…
  • Newer model (released Jul 2026)
Choose Kimi K3 if…
  • Costs less per token — $6.00 vs $20.00 blended
  • Larger context window (1.0M)
  • Open weights — self-hostable
FAQ
Which is better, Claude Opus 5 (Fast) or Kimi K3?
We do not hold independently-run benchmark scores covering both Claude Opus 5 (Fast) and Kimi K3, so we make no quality claim. Their pricing and specifications are compared on this page.
Is Claude Opus 5 (Fast) cheaper than Kimi K3?
Kimi K3 is cheaper: $6.00 versus $20.00 per million tokens blended at 3:1 input:output. Input alone: $10.00 vs $3.00. Output alone: $50.00 vs $15.00.
What context windows do Claude Opus 5 (Fast) and Kimi K3 have?
Claude Opus 5 (Fast): 1,000,000 tokens. Kimi K3: 1,048,576 tokens.
Who makes Claude Opus 5 (Fast) and Kimi K3?
Claude Opus 5 (Fast) is made by Anthropic. Kimi K3 is made by Moonshot AI.
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