token.app › Compare › Claude Opus 4.8 (Fast) vs Kimi K3

Claude Opus 4.8 (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 4.8 (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—
ReleasedMay 2026Jul 2026
LicenceProprietaryOpen weights
Choose Claude Opus 4.8 (Fast) if…
  • No clear advantage on the data we hold.
Choose Kimi K3 if…
  • Costs less per token — $6.00 vs $20.00 blended
  • Larger context window (1.0M)
  • Open weights — self-hostable
  • Newer model (released Jul 2026)
FAQ
Which is better, Claude Opus 4.8 (Fast) or Kimi K3?
We do not hold independently-run benchmark scores covering both Claude Opus 4.8 (Fast) and Kimi K3, so we make no quality claim. Their pricing and specifications are compared on this page.
Is Claude Opus 4.8 (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 4.8 (Fast) and Kimi K3 have?
Claude Opus 4.8 (Fast): 1,000,000 tokens. Kimi K3: 1,048,576 tokens.
Who makes Claude Opus 4.8 (Fast) and Kimi K3?
Claude Opus 4.8 (Fast) is made by Anthropic. Kimi K3 is made by Moonshot AI.
Related comparisons
Claude Opus 4.8 (Fast) full details Kimi K3 full details Claude Opus 4.8 (Fast) vs Ling 3.0 Tiny (free) Claude Opus 4.8 (Fast) vs Muse Spark 1.2 Claude Opus 4.8 (Fast) vs Qwen3.8 Max Claude Opus 4.8 (Fast) vs DeepSeek V4 Flash Latest Claude Opus 4.8 (Fast) vs DeepSeek V4 Flash 0731 Claude Opus 4.8 (Fast) vs Inkling Small