token.app › Compare › DeepSeek V3.1 Terminus vs Claude Opus 5

DeepSeek V3.1 Terminus vs Claude Opus 5

DeepSeek V3.1 Terminus is 22× cheaper per token on a blended 3:1 basis. Claude Opus 5 accepts the larger context window (1M).

Head to head
Blended price uses a 3:1 input:output mix
DeepSeek V3.1 TerminusClaude Opus 5
ProviderDeepSeekAnthropic
Input $/1M$0.270$5.00
Output $/1M$1.00$25.00
Blended $/1M$0.453$10.00
Context window164K1M
Max output33K128K
ReleasedSep 2025Jul 2026
LicenceOpen weightsProprietary
Choose DeepSeek V3.1 Terminus if…
  • Costs less per token — $0.453 vs $10.00 blended
  • Open weights — self-hostable
Choose Claude Opus 5 if…
  • Larger context window (1M)
  • Newer model (released Jul 2026)
FAQ
Which is better, DeepSeek V3.1 Terminus or Claude Opus 5?
We do not hold independently-run benchmark scores covering both DeepSeek V3.1 Terminus and Claude Opus 5, so we make no quality claim. Their pricing and specifications are compared on this page.
Is DeepSeek V3.1 Terminus cheaper than Claude Opus 5?
DeepSeek V3.1 Terminus is cheaper: $0.453 versus $10.00 per million tokens blended at 3:1 input:output. Input alone: $0.270 vs $5.00. Output alone: $1.00 vs $25.00.
What context windows do DeepSeek V3.1 Terminus and Claude Opus 5 have?
DeepSeek V3.1 Terminus: 163,840 tokens. Claude Opus 5: 1,000,000 tokens.
Who makes DeepSeek V3.1 Terminus and Claude Opus 5?
DeepSeek V3.1 Terminus is made by DeepSeek. Claude Opus 5 is made by Anthropic.
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