Model Comparison

Claude 3.5 Sonnet vs DeepSeek-V3.1

DeepSeek-V3.1 significantly outperforms across most benchmarks. DeepSeek-V3.1 is 13.3x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Claude 3.5 Sonnet outperforms in 0 benchmarks, while DeepSeek-V3.1 is better at 3 benchmarks (GPQA, MMLU-Pro, SWE-Bench Verified).

DeepSeek-V3.1 significantly outperforms across most benchmarks.

Sat Apr 11 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 3.5 Sonnet ($3.00/1M tokens) is 11.1x more expensive than DeepSeek-V3.1 ($0.27/1M tokens).

For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 15.0x more expensive than DeepSeek-V3.1 ($1.00/1M tokens).

In conclusion, Claude 3.5 Sonnet is more expensive than DeepSeek-V3.1.*

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

Lowest available price from all providers
Sat Apr 11 2026 • llm-stats.com
Anthropic
Claude 3.5 Sonnet
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
DeepSeek
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 3.5 Sonnet accepts 200,000 input tokens compared to DeepSeek-V3.1's 163,840 tokens. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while DeepSeek-V3.1 is limited to 163,840 tokens.

Anthropic
Claude 3.5 Sonnet
Input200,000 tokens
Output200,000 tokens
DeepSeek
DeepSeek-V3.1
Input163,840 tokens
Output163,840 tokens
Sat Apr 11 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3.5 Sonnet supports multimodal inputs, whereas DeepSeek-V3.1 does not.

Claude 3.5 Sonnet can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude 3.5 Sonnet

Text
Images
Audio
Video

DeepSeek-V3.1

Text
Images
Audio
Video

License

Usage and distribution terms

Claude 3.5 Sonnet 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 3.5 Sonnet

Proprietary

Closed source

DeepSeek-V3.1

MIT

Open weights

Release Timeline

When each model was launched

Claude 3.5 Sonnet was released on 2024-10-22, while DeepSeek-V3.1 was released on 2025-01-10.

DeepSeek-V3.1 is 3 months newer than Claude 3.5 Sonnet.

Claude 3.5 Sonnet

Oct 22, 2024

1.5 years ago

DeepSeek-V3.1

Jan 10, 2025

1.2 years ago

2mo 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 3.5 Sonnet is available from Anthropic, Bedrock, Google. DeepSeek-V3.1 is available from DeepInfra, Novita.

Claude 3.5 Sonnet

anthropic logo
Anthropic
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
google logo
Google
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

DeepSeek-V3.1

deepinfra logo
Deepinfra
Input Price:Input: $0.27/1MOutput Price:Output: $1.00/1M
novita logo
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

Anthropic
Larger context window (200,000 tokens)
Supports multimodal inputs
DeepSeek
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher GPQA score (74.9% vs 67.2%)
Higher MMLU-Pro score (83.7% vs 77.6%)
Higher SWE-Bench Verified score (66.0% vs 49.0%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3.5 Sonnet
DeepSeek
DeepSeek-V3.1

FAQ

Common questions about Claude 3.5 Sonnet vs DeepSeek-V3.1

DeepSeek-V3.1 significantly outperforms across most benchmarks. Claude 3.5 Sonnet 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.
Claude 3.5 Sonnet scores GSM8k: 96.4%, DocVQA: 95.2%, AI2D: 94.7%, HumanEval: 93.7%, BIG-Bench Hard: 93.1%. DeepSeek-V3.1 scores SimpleQA: 93.4%, MMLU-Redux: 91.8%, MMLU-Pro: 83.7%, GPQA: 74.9%, CodeForces: 69.7%.
DeepSeek-V3.1 is 11.1x cheaper for input tokens. Claude 3.5 Sonnet costs $3.00/M input and $15.00/M output via anthropic. DeepSeek-V3.1 costs $0.27/M input and $1.00/M output via deepinfra.
Claude 3.5 Sonnet 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.
Key differences include context window (200K vs 164K), input pricing ($3.00 vs $0.27/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.
Claude 3.5 Sonnet is developed by Anthropic and DeepSeek-V3.1 is developed by DeepSeek.