Model Comparison

Claude 3 Opus vs DeepSeek-V4-Flash-0731Which is better in 2026?

Comparing Claude 3 Opus and DeepSeek-V4-Flash-0731 across benchmarks, pricing, and capabilities.

Verdict: Claude 3 Opus vs DeepSeek-V4-Flash-0731 — which is better?

Claude 3 Opus (by Anthropic) and DeepSeek-V4-Flash-0731 (by DeepSeek) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

On price, DeepSeek-V4-Flash-0731 is roughly 266.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

DeepSeek-V4-Flash-0731 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude 3 Opus if…

  • you want predictable pricing at $15.00/M input and $75.00/M output

Choose DeepSeek-V4-Flash-0731 if…

  • cost matters — it's about 266.7x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Jul 2026
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Claude 3 Opus and DeepSeek-V4-Flash-0731don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

DeepSeek-V4-Flash-0731 costs less

For input processing, Claude 3 Opus ($15.00/1M tokens) is 166.7x more expensive than DeepSeek-V4-Flash-0731 ($0.09/1M tokens).

For output processing, Claude 3 Opus ($75.00/1M tokens) is 416.7x more expensive than DeepSeek-V4-Flash-0731 ($0.18/1M tokens).

In conclusion, Claude 3 Opus is more expensive than DeepSeek-V4-Flash-0731.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Mon Aug 03 2026 • llm-stats.com
Anthropic
Claude 3 Opus
Input tokens$15.00
Output tokens$75.00
Best providerAnthropic
DeepSeek
DeepSeek-V4-Flash-0731
Input tokens$0.09
Output tokens$0.18
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

DeepSeek-V4-Flash-0731 accepts 1,048,576 input tokens compared to Claude 3 Opus's 200,000 tokens. Claude 3 Opus can generate longer responses up to 200,000 tokens, while DeepSeek-V4-Flash-0731 is limited to 65,536 tokens.

Anthropic
Claude 3 Opus
Input200,000 tokens
Output200,000 tokens
DeepSeek
DeepSeek-V4-Flash-0731
Input1,048,576 tokens
Output65,536 tokens
Mon Aug 03 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3 Opus supports multimodal inputs, whereas DeepSeek-V4-Flash-0731 does not.

Claude 3 Opus can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude 3 Opus

Text
Images
Audio
Video

DeepSeek-V4-Flash-0731

Text
Images
Audio
Video

License

Usage and distribution terms

Claude 3 Opus is licensed under a proprietary license, while DeepSeek-V4-Flash-0731 uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Claude 3 Opus

Proprietary

Closed source

DeepSeek-V4-Flash-0731

MIT

Open weights

Release Timeline

When each model was launched

Claude 3 Opus was released on 2024-02-29, while DeepSeek-V4-Flash-0731 was released on 2026-07-31.

DeepSeek-V4-Flash-0731 is 29 months newer than Claude 3 Opus.

Claude 3 Opus

Feb 29, 2024

2.4 years ago

DeepSeek-V4-Flash-0731

Jul 31, 2026

3 days ago

2.4yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude 3 Opus is available from Anthropic, Bedrock, Google. DeepSeek-V4-Flash-0731 is available from DeepInfra, Fireworks, Novita.

Claude 3 Opus

anthropic logo
Anthropic
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
google logo
Google
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M

DeepSeek-V4-Flash-0731

deepinfra logo
Deepinfra
Input Price:Input: $0.09/1MOutput Price:Output: $0.18/1M
fireworks logo
Fireworks
Input Price:Input: $0.14/1MOutput Price:Output: $0.28/1M
novita logo
Novita
Input Price:Input: $0.14/1MOutput Price:Output: $0.28/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Supports multimodal inputs
DeepSeek
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude 3 Opus and DeepSeek-V4-Flash-0731 side-by-side, then vote on the output you prefer.

Claude 3 Opus
✓ Preferred
DeepSeek-V4-Flash-0731
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude 3 Opus
DeepSeek
DeepSeek-V4-Flash-0731

FAQ

Common questions about Claude 3 Opus vs DeepSeek-V4-Flash-0731.

Which is better, Claude 3 Opus or DeepSeek-V4-Flash-0731?

Claude 3 Opus (Anthropic) and DeepSeek-V4-Flash-0731 (DeepSeek) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Claude 3 Opus compare to DeepSeek-V4-Flash-0731 in benchmarks?

Claude 3 Opus scores ARC-C: 96.4%, HellaSwag: 95.4%, GSM8k: 95.0%, MGSM: 90.7%, BIG-Bench Hard: 86.8%. DeepSeek-V4-Flash-0731 scores Terminal-Bench 2.1: 82.7%, CyberGym: 76.7%, Toolathlon: 70.3%, DSBench-FullStack: 68.7%, DSBench-Hard: 59.6%.

Is Claude 3 Opus cheaper than DeepSeek-V4-Flash-0731?

DeepSeek-V4-Flash-0731 is 166.7x cheaper for input tokens. Claude 3 Opus costs $15.00/M input and $75.00/M output via anthropic. DeepSeek-V4-Flash-0731 costs $0.09/M input and $0.18/M output via deepinfra.

What are the context window sizes for Claude 3 Opus and DeepSeek-V4-Flash-0731?

Claude 3 Opus supports 200K tokens and DeepSeek-V4-Flash-0731 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude 3 Opus and DeepSeek-V4-Flash-0731?

Key differences include context window (200K vs 1.0M), input pricing ($15.00 vs $0.09/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude 3 Opus and DeepSeek-V4-Flash-0731?

Claude 3 Opus is developed by Anthropic and DeepSeek-V4-Flash-0731 is developed by DeepSeek.

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