token.app › Compare › Claude Opus 5 (Fast) vs DeepSeek V4 Flash 0731

Claude Opus 5 (Fast) vs DeepSeek V4 Flash 0731

DeepSeek V4 Flash 0731 is 178× cheaper per token on a blended 3:1 basis. DeepSeek V4 Flash 0731 accepts the larger context window (1.0M).

Head to head
Blended price uses a 3:1 input:output mix
Claude Opus 5 (Fast)DeepSeek V4 Flash 0731
ProviderAnthropicDeepSeek
Input $/1M$10.00$0.090
Output $/1M$50.00$0.180
Blended $/1M$20.00$0.113
Context window1M1.0M
Max output128K384K
ReleasedJul 2026Jul 2026
LicenceProprietaryOpen weights
Choose Claude Opus 5 (Fast) if…
  • No clear advantage on the data we hold.
Choose DeepSeek V4 Flash 0731 if…
  • Costs less per token — $0.113 vs $20.00 blended
  • Larger context window (1.0M)
  • Open weights — self-hostable
  • Newer model (released Jul 2026)
FAQ
Which is better, Claude Opus 5 (Fast) or DeepSeek V4 Flash 0731?
We do not hold independently-run benchmark scores covering both Claude Opus 5 (Fast) and DeepSeek V4 Flash 0731, so we make no quality claim. Their pricing and specifications are compared on this page.
Is Claude Opus 5 (Fast) cheaper than DeepSeek V4 Flash 0731?
DeepSeek V4 Flash 0731 is cheaper: $0.113 versus $20.00 per million tokens blended at 3:1 input:output. Input alone: $10.00 vs $0.090. Output alone: $50.00 vs $0.180.
What context windows do Claude Opus 5 (Fast) and DeepSeek V4 Flash 0731 have?
Claude Opus 5 (Fast): 1,000,000 tokens. DeepSeek V4 Flash 0731: 1,048,576 tokens.
Who makes Claude Opus 5 (Fast) and DeepSeek V4 Flash 0731?
Claude Opus 5 (Fast) is made by Anthropic. DeepSeek V4 Flash 0731 is made by DeepSeek.
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