Claude Sonnet 4.6 vs GPT-5.4 nano Comparison

Comparing Claude Sonnet 4.6 and GPT-5.4 nano across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Claude Sonnet 4.6 outperforms in 6 benchmarks (GPQA, Humanity's Last Exam, MCP Atlas, MMMU-Pro, Tau2 Telecom, Terminal-Bench 2.0), while GPT-5.4 nano is better at 0 benchmarks.

Claude Sonnet 4.6 significantly outperforms across most benchmarks.

Wed Mar 18 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5.4 nano costs less

For input processing, Claude Sonnet 4.6 ($3.00/1M tokens) is 15.0x more expensive than GPT-5.4 nano ($0.20/1M tokens).

For output processing, Claude Sonnet 4.6 ($15.00/1M tokens) is 12.0x more expensive than GPT-5.4 nano ($1.25/1M tokens).

In conclusion, Claude Sonnet 4.6 is more expensive than GPT-5.4 nano.*

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

Lowest available price from all providers
Wed Mar 18 2026 • llm-stats.com
Anthropic
Claude Sonnet 4.6
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
OpenAI
GPT-5.4 nano
Input tokens$0.20
Output tokens$1.25
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.4 nano accepts 400,000 input tokens compared to Claude Sonnet 4.6's 200,000 tokens. GPT-5.4 nano can generate longer responses up to 128,000 tokens, while Claude Sonnet 4.6 is limited to 64,000 tokens.

Anthropic
Claude Sonnet 4.6
Input200,000 tokens
Output64,000 tokens
OpenAI
GPT-5.4 nano
Input400,000 tokens
Output128,000 tokens
Wed Mar 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Sonnet 4.6 and GPT-5.4 nano support multimodal inputs.

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

Claude Sonnet 4.6

Text
Images
Audio
Video

GPT-5.4 nano

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 4.6

Proprietary

Closed source

GPT-5.4 nano

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 4.6 was released on 2026-02-17, while GPT-5.4 nano was released on 2026-03-17.

GPT-5.4 nano is 1 month newer than Claude Sonnet 4.6.

Claude Sonnet 4.6

Feb 17, 2026

4 weeks ago

GPT-5.4 nano

Mar 17, 2026

1 days ago

4w newer

Knowledge Cutoff

When training data ends

GPT-5.4 nano has a documented knowledge cutoff of 2025-08-31, while Claude Sonnet 4.6's cutoff date is not specified.

We can confirm GPT-5.4 nano's training data extends to 2025-08-31, but cannot make a direct comparison without Claude Sonnet 4.6's cutoff date.

Claude Sonnet 4.6

—

GPT-5.4 nano

Aug 2025

Provider Availability

Claude Sonnet 4.6 is available from Anthropic. GPT-5.4 nano is available from OpenAI. The availability of providers can affect quality of the model and reliability.

Claude Sonnet 4.6

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

GPT-5.4 nano

openai logo
OpenAI
Input Price:Input: $0.20/1MOutput Price:Output: $1.25/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Higher GPQA score (89.9% vs 82.8%)
Higher Humanity's Last Exam score (49.0% vs 24.3%)
Higher MCP Atlas score (61.3% vs 56.1%)
Higher MMMU-Pro score (75.6% vs 66.1%)
Higher Tau2 Telecom score (97.9% vs 92.5%)
Higher Terminal-Bench 2.0 score (59.1% vs 46.3%)
OpenAI
Larger context window (400,000 tokens)
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Sonnet 4.6
OpenAI
GPT-5.4 nano