modelgrep

Anthropic: Claude Sonnet 5 vs OpenAI: GPT-5.6 Sol

anthropic logoAnthropic: Claude Sonnet 5anthropic/claude-sonnet-5VSopenai logoOpenAI: GPT-5.6 Solopenai/gpt-5.6-sol

Anthropic: Claude Sonnet 5 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.

MetricAnthropic: Claude Sonnet 5OpenAI: GPT-5.6 Sol
Intelligence Index53.458.9✓
Coding Index71.577.4✓
GPQA Diamond91%94%✓
Design Arena Elo1322✓—
Speed (tokens/sec)61✓48
Latency2.0s✓3.7s
Input price /M$2.00✓$5.00
Output price /M$10.00✓$30.00
Context window1M1.1M✓
CapabilitiesReasoningToolsJSONVisionReasoningToolsJSONVision
Anthropic: Claude Sonnet 5 details →OpenAI: GPT-5.6 Sol details →