Model Comparison

Claude Sonnet 4 vs o1

Both models are evenly matched across the benchmarks. Claude Sonnet 4 is 4.4x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Claude Sonnet 4 outperforms in 3 benchmarks (SWE-Bench Verified, TAU-bench Airline, TAU-bench Retail), while o1 is better at 3 benchmarks (GPQA, MMMLU, MMMU).

Both models are evenly matched across the benchmarks.

Thu Apr 30 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Claude Sonnet 4 costs less

For input processing, Claude Sonnet 4 ($3.00/1M tokens) is 5.0x cheaper than o1 ($15.00/1M tokens).

For output processing, Claude Sonnet 4 ($15.00/1M tokens) is 4.0x cheaper than o1 ($60.00/1M tokens).

In conclusion, o1 is more expensive than Claude Sonnet 4.*

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

Lowest available price from all providers
Thu Apr 30 2026 • llm-stats.com
Anthropic
Claude Sonnet 4
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
OpenAI
o1
Input tokens$15.00
Output tokens$60.00
Best providerAzure
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 200,000 tokens. o1 can generate longer responses up to 100,000 tokens, while Claude Sonnet 4 is limited to 64,000 tokens.

Anthropic
Claude Sonnet 4
Input200,000 tokens
Output64,000 tokens
OpenAI
o1
Input200,000 tokens
Output100,000 tokens
Thu Apr 30 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Sonnet 4 supports multimodal inputs, whereas o1 does not.

Claude Sonnet 4 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Sonnet 4

Text
Images
Audio
Video

o1

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

Proprietary

Closed source

o1

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 4 was released on 2025-05-22, while o1 was released on 2024-12-17.

Claude Sonnet 4 is 5 months newer than o1.

Claude Sonnet 4

May 22, 2025

11 months ago

5mo newer
o1

Dec 17, 2024

1.4 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 Sonnet 4 is available from Anthropic, Bedrock, Google. o1 is available from Azure, OpenAI.

Claude Sonnet 4

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

o1

azure logo
Azure
Input Price:Input: $15.00/1MOutput Price:Output: $60.00/1M
openai logo
OpenAI
Input Price:Input: $15.00/1MOutput Price:Output: $60.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Supports multimodal inputs
Less expensive input tokens
Less expensive output tokens
Higher SWE-Bench Verified score (72.7% vs 41.0%)
Higher TAU-bench Airline score (60.0% vs 50.0%)
Higher TAU-bench Retail score (80.5% vs 70.8%)
OpenAI
Higher GPQA score (78.0% vs 75.4%)
Higher MMMLU score (87.7% vs 86.5%)
Higher MMMU score (77.6% vs 74.4%)
AnthropicClaude Sonnet 4
OpenAIo1
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Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Sonnet 4
OpenAI
o1

FAQ

Common questions about Claude Sonnet 4 vs o1

Both models are evenly matched across the benchmarks. Claude Sonnet 4 is made by Anthropic and o1 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Claude Sonnet 4 scores MMMLU: 86.5%, TAU-bench Retail: 80.5%, GPQA: 75.4%, MMMU: 74.4%, SWE-Bench Verified: 72.7%. o1 scores GSM8k: 97.1%, MATH: 96.4%, GPQA Physics: 92.8%, MMLU: 91.8%, MGSM: 89.3%.
Claude Sonnet 4 is 5.0x cheaper for input tokens. Claude Sonnet 4 costs $3.00/M input and $15.00/M output via anthropic. o1 costs $15.00/M input and $60.00/M output via azure.
Claude Sonnet 4 supports 200K tokens and o1 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include input pricing ($3.00 vs $15.00/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.
Claude Sonnet 4 is developed by Anthropic and o1 is developed by OpenAI.