Model Comparison

Claude 3.5 Sonnet vs o3-mini

o3-mini has a slight edge in benchmark performance. o3-mini is 3.1x cheaper per token.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

Claude 3.5 Sonnet outperforms in 3 benchmarks (MMLU, TAU-bench Airline, TAU-bench Retail), while o3-mini is better at 4 benchmarks (GPQA, MATH, MGSM, SWE-Bench Verified).

o3-mini has a slight edge in benchmark performance.

Mon Mar 30 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

o3-mini costs less

For input processing, Claude 3.5 Sonnet ($3.00/1M tokens) is 2.7x more expensive than o3-mini ($1.10/1M tokens).

For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 3.4x more expensive than o3-mini ($4.40/1M tokens).

In conclusion, Claude 3.5 Sonnet is more expensive than o3-mini.*

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

Lowest available price from all providers
Mon Mar 30 2026 • llm-stats.com
Anthropic
Claude 3.5 Sonnet
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
OpenAI
o3-mini
Input tokens$1.10
Output tokens$4.40
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. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while o3-mini is limited to 100,000 tokens.

Anthropic
Claude 3.5 Sonnet
Input200,000 tokens
Output200,000 tokens
OpenAI
o3-mini
Input200,000 tokens
Output100,000 tokens
Mon Mar 30 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3.5 Sonnet supports multimodal inputs, whereas o3-mini 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

o3-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 3.5 Sonnet

Proprietary

Closed source

o3-mini

Proprietary

Closed source

Release Timeline

When each model was launched

Claude 3.5 Sonnet was released on 2024-10-22, while o3-mini was released on 2025-01-30.

o3-mini is 3 months newer than Claude 3.5 Sonnet.

Claude 3.5 Sonnet

Oct 22, 2024

1.4 years ago

o3-mini

Jan 30, 2025

1.2 years ago

3mo newer

Knowledge Cutoff

When training data ends

o3-mini has a documented knowledge cutoff of 2023-09-30, while Claude 3.5 Sonnet's cutoff date is not specified.

We can confirm o3-mini's training data extends to 2023-09-30, but cannot make a direct comparison without Claude 3.5 Sonnet's cutoff date.

Claude 3.5 Sonnet

—

o3-mini

Sep 2023

Provider Availability

Claude 3.5 Sonnet is available from Anthropic, Bedrock, Google. o3-mini is available from Azure, OpenAI.

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

o3-mini

azure logo
Azure
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M
openai logo
OpenAI
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Supports multimodal inputs
Higher MMLU score (90.4% vs 86.9%)
Higher TAU-bench Airline score (46.0% vs 32.4%)
Higher TAU-bench Retail score (69.2% vs 57.6%)
OpenAI
Less expensive input tokens
Less expensive output tokens
Higher GPQA score (77.2% vs 67.2%)
Higher MATH score (97.9% vs 78.3%)
Higher MGSM score (92.0% vs 91.6%)
Higher SWE-Bench Verified score (49.3% vs 49.0%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3.5 Sonnet
OpenAI
o3-mini

FAQ

Common questions about Claude 3.5 Sonnet vs o3-mini

o3-mini has a slight edge in benchmark performance. Claude 3.5 Sonnet is made by Anthropic and o3-mini is made by OpenAI. 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%. o3-mini scores COLLIE: 98.7%, MATH: 97.9%, IFEval: 93.9%, MGSM: 92.0%, AIME 2024: 87.3%.
o3-mini is 2.7x cheaper for input tokens. Claude 3.5 Sonnet costs $3.00/M input and $15.00/M output via anthropic. o3-mini costs $1.10/M input and $4.40/M output via azure.
Claude 3.5 Sonnet supports 200K tokens and o3-mini 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 $1.10/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.
Claude 3.5 Sonnet is developed by Anthropic and o3-mini is developed by OpenAI.