Claude Sonnet 4.6 vs GPT-5.1 High Comparison

Comparing Claude Sonnet 4.6 and GPT-5.1 High across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Sonnet 4.6 outperforms in 1 benchmarks (GPQA), while GPT-5.1 High is better at 0 benchmarks.

Claude Sonnet 4.6 significantly outperforms across most benchmarks.

Tue Mar 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5.1 High costs less

For input processing, Claude Sonnet 4.6 ($3.00/1M tokens) is 2.4x more expensive than GPT-5.1 High ($1.25/1M tokens).

For output processing, Claude Sonnet 4.6 ($15.00/1M tokens) is 1.5x more expensive than GPT-5.1 High ($10.00/1M tokens).

In conclusion, Claude Sonnet 4.6 is more expensive than GPT-5.1 High.*

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

Lowest available price from all providers

Tue Mar 17 2026 • llm-stats.com

Claude Sonnet 4.6

Input tokens$3.00

Output tokens$15.00

Best providerAnthropic

GPT-5.1 High

Input tokens$1.25

Output tokens$10.00

Best providerOpenAI

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Context Window

Maximum input and output token capacity

GPT-5.1 High accepts 400,000 input tokens compared to Claude Sonnet 4.6's 200,000 tokens. GPT-5.1 High can generate longer responses up to 128,000 tokens, while Claude Sonnet 4.6 is limited to 64,000 tokens.

Claude Sonnet 4.6

Input200,000 tokens

Output64,000 tokens

GPT-5.1 High

Input400,000 tokens

Output128,000 tokens

Tue Mar 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Sonnet 4.6 and GPT-5.1 High 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-5.1 High

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-5.1 High

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 4.6 was released on 2026-02-17, while GPT-5.1 High was released on 2025-11-12.

Claude Sonnet 4.6 is 3 months newer than GPT-5.1 High.

Claude Sonnet 4.6

Feb 17, 2026

4 weeks ago

3mo newer

GPT-5.1 High

Nov 12, 2025

4 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 4.6 is available from Anthropic. GPT-5.1 High is available from OpenAI. The availability of providers can affect quality of the model and reliability.