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  1. Home
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DeepSeek V4 Flash 0731 vs Claude Opus 5

Compare DeepSeek V4 Flash 0731 from DeepSeek and Claude Opus 5 from Anthropic on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

Favicon for deepseek
DeepSeek V4 Flash 0731
Favicon for anthropic
Claude Opus 5
Favicon for deepseek
DeepSeek V4 Flash 0731
Favicon for anthropic
Claude Opus 5

Overview

DeepSeek V4 Flash 0731
Author
DeepSeek
Claude Opus 5
Author
Anthropic
DeepSeek V4 Flash 0731
Context length
1.05Mtokens
Claude Opus 5
Context length
1Mtokens
DeepSeek V4 Flash 0731
Reasoning
Claude Opus 5
Reasoning
DeepSeek V4 Flash 0731
Input modalities
Claude Opus 5
Input modalities
DeepSeek V4 Flash 0731
Output modalities
Claude Opus 5
Output modalities

DeepSeek V4 Flash 0731 vs Claude Opus 5: side-by-side summary

DeepSeek V4 Flash 0731 and Claude Opus 5 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

DeepSeek V4 Flash 0731, from DeepSeek, has a 1,048,576-token context window and is priced at $0.0509/M tokens input, $0.1487/M tokens output on OpenRouter.

Claude Opus 5, from Anthropic, has a 1,000,000-token context window and is priced at $5/M tokens input, $25/M tokens output on OpenRouter.

Context window
  • DeepSeek V4 Flash 0731: 1,048,576 tokens
  • Claude Opus 5: 1,000,000 tokens
Price
  • DeepSeek V4 Flash 0731: $0.0509/M tokens input, $0.1487/M tokens output
  • Claude Opus 5: $5/M tokens input, $25/M tokens output
Provided by
  • DeepSeek V4 Flash 0731: DeepSeek
  • Claude Opus 5: Anthropic
  • DeepSeek V4 Flash 0731 model details, providers and pricing
  • Claude Opus 5 model details, providers and pricing

DeepSeek V4 Flash 0731 vs Claude Opus 5 at a glance

DeepSeek V4 Flash 0731 vs Claude Opus 5 comparison
AttributeDeepSeek V4 Flash 0731Claude Opus 5
Input price$0.0509/M tokens$5/M tokens
Output price$0.1487/M tokens$25/M tokens
Context window1,048,576 tokens1,000,000 tokens
Intelligence IndexNot availableNot available
Coding Index69.178.0
Agentic Index41.056.5
Latency (p50)0.62 s2.87 s
Throughput (p50)66.0 tok/s67.0 tok/s

Benchmark data updated Oct 28, 2026

Frequently asked questions

Is DeepSeek V4 Flash 0731 cheaper than Claude Opus 5?

DeepSeek V4 Flash 0731 is cheaper than Claude Opus 5 on OpenRouter: DeepSeek V4 Flash 0731 costs $0.0509/M tokens input and $0.1487/M tokens output, while Claude Opus 5 costs $5/M tokens input and $25/M tokens output.

Which has the longer context window, DeepSeek V4 Flash 0731 or Claude Opus 5?

DeepSeek V4 Flash 0731 has the longer context window at 1,048,576 tokens, compared with 1,000,000 tokens for Claude Opus 5.

Which is faster, DeepSeek V4 Flash 0731 or Claude Opus 5?

Claude Opus 5 is faster on OpenRouter, generating a median 67.0 tokens per second compared with 66.0 tokens per second for DeepSeek V4 Flash 0731.

Which scores higher on coding, DeepSeek V4 Flash 0731 or Claude Opus 5?

Claude Opus 5 scores higher on coding, with an Artificial Analysis Coding Index of 78.0 compared with 69.1 for DeepSeek V4 Flash 0731.