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AnthropicClaude Sonnet 4.6VSOpenAIGPT-5.4 nano

Analysis by:the whichllmmodel Editorial Team|Updated: June 2026

Our Take

Standardized reasoning and coding benchmarks are currently pending verification for one or both of these models. We recommend testing Claude Sonnet 4.6 and GPT-5.4 nano directly in their respective provider playgrounds to see which fits your specific prompt styles best.
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Model Specs

Claude Sonnet 4.6

Benchmarks & Scores

Coding (swe-bench-pro)
N/A

complex codebases, multi-file repositories, and architectural planning

Reasoning (gpqa-diamond)
79.9%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)
$6.00Input: $3.00 | Output: $15.00
Context WindowLarger
1.05M tokens
Model Specs

GPT-5.4 nano

Benchmarks & Scores

Coding (swe-bench-pro)
52.4%

complex codebases, multi-file repositories, and architectural planning

Reasoning (gpqa-diamond)Winner (+2.9%)
82.8%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)13.0x cheaper
$0.46Input: $0.20 | Output: $1.25
Context Window
400k tokens

Frequently Asked Questions about Claude Sonnet 4.6 vs GPT-5.4 nano

GPT-5.4 nano is cheaper than Claude Sonnet 4.6. GPT-5.4 nano has a blended cost of $0.46/1M tokens, which is about 13.0x cheaper than Claude Sonnet 4.6 at $6.00/1M tokens.

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