Model Comparison

Claude Opus 4.1 vs DeepSeek-V3.1

Claude Opus 4.1 significantly outperforms across most benchmarks. DeepSeek-V3.1 is 66.3x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Claude Opus 4.1 outperforms in 4 benchmarks (AIME 2025, GPQA, SWE-Bench Verified, Terminal-Bench), while DeepSeek-V3.1 is better at 0 benchmarks.

Claude Opus 4.1 significantly outperforms across most benchmarks.

Wed May 13 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

DeepSeek-V3.1 costs less

For input processing, Claude Opus 4.1 ($15.00/1M tokens) is 55.6x more expensive than DeepSeek-V3.1 ($0.27/1M tokens).

For output processing, Claude Opus 4.1 ($75.00/1M tokens) is 75.0x more expensive than DeepSeek-V3.1 ($1.00/1M tokens).

In conclusion, Claude Opus 4.1 is more expensive than DeepSeek-V3.1.*

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

Lowest available price from all providers

Wed May 13 2026 • llm-stats.com

Claude Opus 4.1

Input tokens$15.00

Output tokens$75.00

Best providerAnthropic

DeepSeek-V3.1

Input tokens$0.27

Output tokens$1.00

Best providerDeepinfra

Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 4.1 accepts 200,000 input tokens compared to DeepSeek-V3.1's 163,840 tokens. DeepSeek-V3.1 can generate longer responses up to 163,840 tokens, while Claude Opus 4.1 is limited to 32,000 tokens.

Claude Opus 4.1

Input200,000 tokens

Output32,000 tokens

DeepSeek-V3.1

Input163,840 tokens

Output163,840 tokens

Wed May 13 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Opus 4.1 supports multimodal inputs, whereas DeepSeek-V3.1 does not.

Claude Opus 4.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Opus 4.1

Text

Images

Audio

Video

DeepSeek-V3.1

Text

Images

Audio

Video

License

Usage and distribution terms

Claude Opus 4.1 is licensed under a proprietary license, while DeepSeek-V3.1 uses MIT.

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

Claude Opus 4.1

Proprietary

Closed source

DeepSeek-V3.1

MIT

Open weights

Release Timeline

When each model was launched

Claude Opus 4.1 was released on 2025-08-05, while DeepSeek-V3.1 was released on 2025-01-10.

Claude Opus 4.1 is 7 months newer than DeepSeek-V3.1.

Claude Opus 4.1

Aug 5, 2025

9 months ago

6mo newer

DeepSeek-V3.1

Jan 10, 2025

1.3 years ago

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 Opus 4.1 is available from Anthropic, Bedrock, Google. DeepSeek-V3.1 is available from DeepInfra, Novita.

Claude Opus 4.1

Anthropic

Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M

AWS Bedrock

Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M

Google

Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M

DeepSeek-V3.1

Deepinfra

Input Price:Input: $0.27/1MOutput Price:Output: $1.00/1M

Novita

Input Price:Input: $0.27/1MOutput Price:Output: $1.00/1M

* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Claude Opus 4.1

View details

Anthropic

Larger context window (200,000 tokens)

Supports multimodal inputs

Higher AIME 2025 score (78.0% vs 49.8%)

Higher GPQA score (80.9% vs 74.9%)

Higher SWE-Bench Verified score (74.5% vs 66.0%)

Higher Terminal-Bench score (43.3% vs 31.3%)

DeepSeek-V3.1

View details

DeepSeek

Less expensive input tokens

Less expensive output tokens

Has open weights

Detailed Comparison

AI Model Comparison Table
Feature	Claude Opus 4.1	DeepSeek-V3.1

FAQ

Common questions about Claude Opus 4.1 vs DeepSeek-V3.1.

Which is better, Claude Opus 4.1 or DeepSeek-V3.1?

Claude Opus 4.1 significantly outperforms across most benchmarks. Claude Opus 4.1 is made by Anthropic and DeepSeek-V3.1 is made by DeepSeek. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Opus 4.1 compare to DeepSeek-V3.1 in benchmarks?

Claude Opus 4.1 scores MMMLU: 89.5%, TAU-bench Retail: 82.4%, GPQA: 80.9%, AIME 2025: 78.0%, MMMU (validation): 77.1%. DeepSeek-V3.1 scores SimpleQA: 93.4%, MMLU-Redux: 91.8%, MMLU-Pro: 83.7%, GPQA: 74.9%, CodeForces: 69.7%.

Is Claude Opus 4.1 cheaper than DeepSeek-V3.1?

DeepSeek-V3.1 is 55.6x cheaper for input tokens. Claude Opus 4.1 costs $15.00/M input and $75.00/M output via anthropic. DeepSeek-V3.1 costs $0.27/M input and $1.00/M output via deepinfra.

What are the context window sizes for Claude Opus 4.1 and DeepSeek-V3.1?

Claude Opus 4.1 supports 200K tokens and DeepSeek-V3.1 supports 164K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 4.1 and DeepSeek-V3.1?

Key differences include context window (200K vs 164K), input pricing ($15.00 vs $0.27/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 4.1 and DeepSeek-V3.1?

Claude Opus 4.1 is developed by Anthropic and DeepSeek-V3.1 is developed by DeepSeek.