Model Comparison

Claude Sonnet 4.5 vs GPT-4.1 mini

Claude Sonnet 4.5 significantly outperforms across most benchmarks. GPT-4.1 mini is 8.6x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Claude Sonnet 4.5 outperforms in 5 benchmarks (AIME 2025, GPQA, MMMLU, TAU-bench Airline, TAU-bench Retail), while GPT-4.1 mini is better at 0 benchmarks.

Claude Sonnet 4.5 significantly outperforms across most benchmarks.

Wed Apr 22 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-4.1 mini costs less

For input processing, Claude Sonnet 4.5 ($3.00/1M tokens) is 7.5x more expensive than GPT-4.1 mini ($0.40/1M tokens).

For output processing, Claude Sonnet 4.5 ($15.00/1M tokens) is 9.4x more expensive than GPT-4.1 mini ($1.60/1M tokens).

In conclusion, Claude Sonnet 4.5 is more expensive than GPT-4.1 mini.*

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

Lowest available price from all providers
Wed Apr 22 2026 • llm-stats.com
Anthropic
Claude Sonnet 4.5
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
OpenAI
GPT-4.1 mini
Input tokens$0.40
Output tokens$1.60
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-4.1 mini accepts 1,047,576 input tokens compared to Claude Sonnet 4.5's 200,000 tokens. Claude Sonnet 4.5 can generate longer responses up to 64,000 tokens, while GPT-4.1 mini is limited to 32,768 tokens.

Anthropic
Claude Sonnet 4.5
Input200,000 tokens
Output64,000 tokens
OpenAI
GPT-4.1 mini
Input1,047,576 tokens
Output32,768 tokens
Wed Apr 22 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Sonnet 4.5 and GPT-4.1 mini support multimodal inputs.

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

Claude Sonnet 4.5

Text
Images
Audio
Video

GPT-4.1 mini

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 Sonnet 4.5

Proprietary

Closed source

GPT-4.1 mini

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 4.5 was released on 2025-09-29, while GPT-4.1 mini was released on 2025-04-14.

Claude Sonnet 4.5 is 6 months newer than GPT-4.1 mini.

Claude Sonnet 4.5

Sep 29, 2025

6 months ago

5mo newer
GPT-4.1 mini

Apr 14, 2025

1.0 years ago

Knowledge Cutoff

When training data ends

Claude Sonnet 4.5 has a knowledge cutoff of 2025-01-31, while GPT-4.1 mini has a cutoff of 2024-05-31.

Claude Sonnet 4.5 has more recent training data (up to 2025-01-31), making it potentially better informed about events through that date compared to GPT-4.1 mini (2024-05-31).

Claude Sonnet 4.5

Jan 2025

8 mo newer
GPT-4.1 mini

May 2024

Provider Availability

Claude Sonnet 4.5 is available from Anthropic. GPT-4.1 mini is available from OpenAI.

Claude Sonnet 4.5

anthropic logo
Anthropic
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

GPT-4.1 mini

openai logo
OpenAI
Input Price:Input: $0.40/1MOutput Price:Output: $1.60/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Higher AIME 2025 score (87.0% vs 40.2%)
Higher GPQA score (83.4% vs 65.0%)
Higher MMMLU score (89.1% vs 78.5%)
Higher TAU-bench Airline score (70.0% vs 36.0%)
Higher TAU-bench Retail score (86.2% vs 55.8%)
OpenAI
Larger context window (1,047,576 tokens)
Less expensive input tokens
Less expensive output tokens
AnthropicClaude Sonnet 4.5
OpenAIGPT-4.1 mini
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Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Sonnet 4.5
OpenAI
GPT-4.1 mini

FAQ

Common questions about Claude Sonnet 4.5 vs GPT-4.1 mini

Claude Sonnet 4.5 significantly outperforms across most benchmarks. Claude Sonnet 4.5 is made by Anthropic and GPT-4.1 mini is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Claude Sonnet 4.5 scores MMMLU: 89.1%, AIME 2025: 87.0%, TAU-bench Retail: 86.2%, GPQA: 83.4%, MMMUval: 77.8%. GPT-4.1 mini scores CharXiv-D: 88.4%, MMLU: 87.5%, IFEval: 84.1%, MMMLU: 78.5%, MathVista: 73.1%.
GPT-4.1 mini is 7.5x cheaper for input tokens. Claude Sonnet 4.5 costs $3.00/M input and $15.00/M output via anthropic. GPT-4.1 mini costs $0.40/M input and $1.60/M output via openai.
Claude Sonnet 4.5 supports 200K tokens and GPT-4.1 mini supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (200K vs 1.0M), input pricing ($3.00 vs $0.40/M). See the full comparison above for benchmark-by-benchmark results.
Claude Sonnet 4.5 is developed by Anthropic and GPT-4.1 mini is developed by OpenAI.