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  1. Home
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  3. Compare

Claude Opus 5 vs DeepSeek V4 Flash 0731

Compare Claude Opus 5 from Anthropic and DeepSeek V4 Flash 0731 from DeepSeek 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 anthropic
Claude Opus 5
Favicon for deepseek
DeepSeek V4 Flash 0731
Favicon for anthropic
Claude Opus 5
Favicon for deepseek
DeepSeek V4 Flash 0731

Overview

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

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

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

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.

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.

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

Claude Opus 5 vs DeepSeek V4 Flash 0731 at a glance

Claude Opus 5 vs DeepSeek V4 Flash 0731 comparison
AttributeClaude Opus 5DeepSeek V4 Flash 0731
Input price$5/M tokens$0.0509/M tokens
Output price$25/M tokens$0.1487/M tokens
Context window1,000,000 tokens1,048,576 tokens
Intelligence IndexNot availableNot available
Coding Index78.069.1
Agentic Index56.541.0
Latency (p50)3.43 s0.58 s
Throughput (p50)60.0 tok/s63.0 tok/s

Benchmark data updated Oct 28, 2026

Frequently asked questions

Is Claude Opus 5 cheaper than DeepSeek V4 Flash 0731?

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, Claude Opus 5 or DeepSeek V4 Flash 0731?

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, Claude Opus 5 or DeepSeek V4 Flash 0731?

DeepSeek V4 Flash 0731 is faster on OpenRouter, generating a median 63.0 tokens per second compared with 60.0 tokens per second for Claude Opus 5.

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

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.