Model Comparison

Claude 3.5 Sonnet vs GPT-4.1 nanoWhich is better in 2026?

Claude 3.5 Sonnet significantly outperforms across most benchmarks. GPT-4.1 nano is 34.3x cheaper per token.

Verdict: Claude 3.5 Sonnet vs GPT-4.1 nano — which is better?

Claude 3.5 Sonnet (by Anthropic) and GPT-4.1 nano (by OpenAI) 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.

Claude 3.5 Sonnet outperforms in 2 benchmarks (GPQA, MMLU), while GPT-4.1 nano is better at 0 benchmarks. Claude 3.5 Sonnet significantly outperforms across most benchmarks.

On price, GPT-4.1 nano is roughly 34.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-4.1 nano also accepts a larger context window (1,047,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude 3.5 Sonnet if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks

Choose GPT-4.1 nano if…

  • cost matters — it's about 34.3x cheaper per token
  • you process long inputs — it offers a 1,047,576 token context window
  • you want the most recent training data — it shipped Apr 2025
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude 3.5 Sonnet outperforms in 2 benchmarks (GPQA, MMLU), while GPT-4.1 nano is better at 0 benchmarks.

Claude 3.5 Sonnet significantly outperforms across most benchmarks.

Tue Jun 16 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-4.1 nano costs less

For input processing, Claude 3.5 Sonnet ($3.00/1M tokens) is 30.0x more expensive than GPT-4.1 nano ($0.10/1M tokens).

For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 37.5x more expensive than GPT-4.1 nano ($0.40/1M tokens).

In conclusion, Claude 3.5 Sonnet is more expensive than GPT-4.1 nano.*

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

Lowest available price from all providers
Tue Jun 16 2026 • llm-stats.com
Anthropic
Claude 3.5 Sonnet
Input tokens$3.00
Output tokens$15.00
Best providerAWS Bedrock
OpenAI
GPT-4.1 nano
Input tokens$0.10
Output tokens$0.40
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-4.1 nano accepts 1,047,576 input tokens compared to Claude 3.5 Sonnet's 200,000 tokens. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while GPT-4.1 nano is limited to 32,768 tokens.

Anthropic
Claude 3.5 Sonnet
Input200,000 tokens
Output200,000 tokens
OpenAI
GPT-4.1 nano
Input1,047,576 tokens
Output32,768 tokens
Tue Jun 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude 3.5 Sonnet and GPT-4.1 nano support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude 3.5 Sonnet

Text
Images
Audio
Video

GPT-4.1 nano

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude 3.5 Sonnet

Proprietary

Closed source

GPT-4.1 nano

Proprietary

Closed source

Release Timeline

When each model was launched

Claude 3.5 Sonnet was released on 2024-06-21, while GPT-4.1 nano was released on 2025-04-14.

GPT-4.1 nano is 10 months newer than Claude 3.5 Sonnet.

Claude 3.5 Sonnet

Jun 21, 2024

2.0 years ago

GPT-4.1 nano

Apr 14, 2025

1.2 years ago

9mo newer

Knowledge Cutoff

When training data ends

GPT-4.1 nano has a documented knowledge cutoff of 2024-05-31, while Claude 3.5 Sonnet's cutoff date is not specified.

We can confirm GPT-4.1 nano's training data extends to 2024-05-31, but cannot make a direct comparison without Claude 3.5 Sonnet's cutoff date.

Claude 3.5 Sonnet

—

GPT-4.1 nano

May 2024

Provider Availability

Claude 3.5 Sonnet is available from Bedrock, Google. GPT-4.1 nano is available from OpenAI.

Claude 3.5 Sonnet

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

GPT-4.1 nano

openai logo
OpenAI
Input Price:Input: $0.10/1MOutput Price:Output: $0.40/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Higher GPQA score (59.4% vs 50.3%)
Higher MMLU score (90.4% vs 80.1%)
OpenAI
Larger context window (1,047,576 tokens)
Less expensive input tokens
Less expensive output tokens
AnthropicClaude 3.5 Sonnet
OpenAIGPT-4.1 nano
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3.5 Sonnet
OpenAI
GPT-4.1 nano

FAQ

Common questions about Claude 3.5 Sonnet vs GPT-4.1 nano.

Which is better, Claude 3.5 Sonnet or GPT-4.1 nano?

Claude 3.5 Sonnet significantly outperforms across most benchmarks. Claude 3.5 Sonnet is made by Anthropic and GPT-4.1 nano is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude 3.5 Sonnet compare to GPT-4.1 nano in benchmarks?

Claude 3.5 Sonnet scores GSM8k: 96.4%, BIG-Bench Hard: 93.1%, HumanEval: 92.0%, MGSM: 91.6%, MMLU: 90.4%. GPT-4.1 nano scores MMLU: 80.1%, IFEval: 74.5%, CharXiv-D: 73.9%, MMMLU: 66.9%, Multi-IF: 57.2%.

Is Claude 3.5 Sonnet cheaper than GPT-4.1 nano?

GPT-4.1 nano is 30.0x cheaper for input tokens. Claude 3.5 Sonnet costs $3.00/M input and $15.00/M output via bedrock. GPT-4.1 nano costs $0.10/M input and $0.40/M output via openai.

What are the context window sizes for Claude 3.5 Sonnet and GPT-4.1 nano?

Claude 3.5 Sonnet supports 200K tokens and GPT-4.1 nano 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 3.5 Sonnet and GPT-4.1 nano?

Key differences include context window (200K vs 1.0M), input pricing ($3.00 vs $0.10/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude 3.5 Sonnet and GPT-4.1 nano?

Claude 3.5 Sonnet is developed by Anthropic and GPT-4.1 nano is developed by OpenAI.

Related comparisons