Model Comparison

Claude Sonnet 4 vs Claude Opus 4

Claude Opus 4 shows notably better performance in the majority of benchmarks. Claude Sonnet 4 is 5.0x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

Claude Sonnet 4 outperforms in 2 benchmarks (SWE-Bench Verified, TAU-bench Airline), while Claude Opus 4 is better at 5 benchmarks (AIME 2025, GPQA, MMMLU, TAU-bench Retail, Terminal-Bench).

Claude Opus 4 shows notably better performance in the majority of benchmarks.

Wed Apr 01 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 Claude Opus 4 ($15.00/1M tokens).

For output processing, Claude Sonnet 4 ($15.00/1M tokens) is 5.0x cheaper than Claude Opus 4 ($75.00/1M tokens).

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

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

Lowest available price from all providers
Wed Apr 01 2026 • llm-stats.com
Anthropic
Claude Sonnet 4
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
Anthropic
Claude Opus 4
Input tokens$15.00
Output tokens$75.00
Best providerAnthropic
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 Sonnet 4 can generate longer responses up to 64,000 tokens, while Claude Opus 4 is limited to 32,000 tokens.

Anthropic
Claude Sonnet 4
Input200,000 tokens
Output64,000 tokens
Anthropic
Claude Opus 4
Input200,000 tokens
Output32,000 tokens
Wed Apr 01 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Sonnet 4 and Claude Opus 4 support multimodal inputs.

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

Claude Sonnet 4

Text
Images
Audio
Video

Claude Opus 4

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

Claude Opus 4

Proprietary

Closed source

Release Timeline

When each model was launched

Both models were released on 2025-05-22.

They likely represent similar generations of model development.

Claude Sonnet 4

May 22, 2025

10 months ago

Claude Opus 4

May 22, 2025

10 months 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. Claude Opus 4 is available from Anthropic, Bedrock, Google.

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

Claude Opus 4

anthropic logo
Anthropic
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
google logo
Google
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Less expensive input tokens
Less expensive output tokens
Higher SWE-Bench Verified score (72.7% vs 72.5%)
Higher TAU-bench Airline score (60.0% vs 59.6%)
Anthropic
Higher AIME 2025 score (75.5% vs 70.5%)
Higher GPQA score (79.6% vs 75.4%)
Higher MMMLU score (88.8% vs 86.5%)
Higher TAU-bench Retail score (81.4% vs 80.5%)
Higher Terminal-Bench score (39.2% vs 35.5%)
AnthropicClaude Sonnet 4
AnthropicClaude Opus 4
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Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Sonnet 4
Anthropic
Claude Opus 4

FAQ

Common questions about Claude Sonnet 4 vs Claude Opus 4

Claude Opus 4 shows notably better performance in the majority of benchmarks. Claude Sonnet 4 is made by Anthropic and Claude Opus 4 is made by Anthropic. 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%. Claude Opus 4 scores MMMLU: 88.8%, TAU-bench Retail: 81.4%, GPQA: 79.6%, MMMU (validation): 76.5%, AIME 2025: 75.5%.
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. Claude Opus 4 costs $15.00/M input and $75.00/M output via anthropic.
Claude Sonnet 4 supports 200K tokens and Claude Opus 4 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). See the full comparison above for benchmark-by-benchmark results.