Model Comparison

GPT-5 vs Claude Sonnet 4

GPT-5 significantly outperforms across most benchmarks. GPT-5 is 1.7x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

GPT-5 outperforms in 4 benchmarks (AIME 2025, GPQA, MMMU, SWE-Bench Verified), while Claude Sonnet 4 is better at 0 benchmarks.

GPT-5 significantly outperforms across most benchmarks.

Sun Apr 05 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5 costs less

For input processing, GPT-5 ($1.25/1M tokens) is 2.4x cheaper than Claude Sonnet 4 ($3.00/1M tokens).

For output processing, GPT-5 ($10.00/1M tokens) is 1.5x cheaper than Claude Sonnet 4 ($15.00/1M tokens).

In conclusion, Claude Sonnet 4 is more expensive than GPT-5.*

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

Lowest available price from all providers
Sun Apr 05 2026 • llm-stats.com
OpenAI
GPT-5
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
Anthropic
Claude Sonnet 4
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5 accepts 400,000 input tokens compared to Claude Sonnet 4's 200,000 tokens. GPT-5 can generate longer responses up to 128,000 tokens, while Claude Sonnet 4 is limited to 64,000 tokens.

OpenAI
GPT-5
Input400,000 tokens
Output128,000 tokens
Anthropic
Claude Sonnet 4
Input200,000 tokens
Output64,000 tokens
Sun Apr 05 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5 and Claude Sonnet 4 support multimodal inputs.

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

GPT-5

Text
Images
Audio
Video

Claude Sonnet 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.

GPT-5

Proprietary

Closed source

Claude Sonnet 4

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5 was released on 2025-08-07, while Claude Sonnet 4 was released on 2025-05-22.

GPT-5 is 3 months newer than Claude Sonnet 4.

GPT-5

Aug 7, 2025

8 months ago

2mo newer
Claude Sonnet 4

May 22, 2025

10 months ago

Knowledge Cutoff

When training data ends

GPT-5 has a documented knowledge cutoff of 2024-09-30, while Claude Sonnet 4's cutoff date is not specified.

We can confirm GPT-5's training data extends to 2024-09-30, but cannot make a direct comparison without Claude Sonnet 4's cutoff date.

GPT-5

Sep 2024

Claude Sonnet 4

—

Provider Availability

GPT-5 is available from OpenAI. Claude Sonnet 4 is available from Anthropic, Bedrock, Google.

GPT-5

openai logo
OpenAI
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M

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
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (400,000 tokens)
Less expensive input tokens
Less expensive output tokens
Higher AIME 2025 score (94.6% vs 70.5%)
Higher GPQA score (85.7% vs 75.4%)
Higher MMMU score (84.2% vs 74.4%)
Higher SWE-Bench Verified score (74.9% vs 72.7%)
Anthropic
OpenAIGPT-5
AnthropicClaude Sonnet 4
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Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5
Anthropic
Claude Sonnet 4

FAQ

Common questions about GPT-5 vs Claude Sonnet 4

GPT-5 significantly outperforms across most benchmarks. GPT-5 is made by OpenAI and Claude Sonnet 4 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
GPT-5 scores SWE-Lancer (IC-Diamond subset): 100.0%, COLLIE: 99.0%, Tau2 Telecom: 96.7%, OpenAI-MRCR: 2 needle 128k: 95.2%, AIME 2025: 94.6%. Claude Sonnet 4 scores MMMLU: 86.5%, TAU-bench Retail: 80.5%, GPQA: 75.4%, MMMU: 74.4%, SWE-Bench Verified: 72.7%.
GPT-5 is 2.4x cheaper for input tokens. GPT-5 costs $1.25/M input and $10.00/M output via openai. Claude Sonnet 4 costs $3.00/M input and $15.00/M output via anthropic.
GPT-5 supports 400K tokens and Claude Sonnet 4 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (400K vs 200K), input pricing ($1.25 vs $3.00/M). See the full comparison above for benchmark-by-benchmark results.
GPT-5 is developed by OpenAI and Claude Sonnet 4 is developed by Anthropic.