modelgrep

Anthropic: Claude Opus 4.8 vs OpenAI: GPT-5.6 Sol

anthropic logoAnthropic: Claude Opus 4.8anthropic/claude-opus-4.8VSopenai logoOpenAI: GPT-5.6 Solopenai/gpt-5.6-sol

Anthropic: Claude Opus 4.8 and OpenAI: GPT-5.6 Sol are evenly matched; the right pick depends on your priorities.

MetricAnthropic: Claude Opus 4.8OpenAI: GPT-5.6 Sol
Intelligence Index55.758.9✓
Coding Index74.377.4✓
GPQA Diamond92%94%✓
Design Arena Elo1288✓—
Speed (tokens/sec)106✓48
Latency1.1s✓3.7s
Input price /M$5.00$5.00
Output price /M$25.00✓$30.00
Context window1M1.1M✓
CapabilitiesReasoningToolsJSONVisionReasoningToolsJSONVision
Anthropic: Claude Opus 4.8 details →OpenAI: GPT-5.6 Sol details →