modelgrep

Anthropic: Claude Opus 4.7 vs OpenAI: GPT-5.6 Luna

anthropic logoAnthropic: Claude Opus 4.7anthropic/claude-opus-4.7VSopenai logoOpenAI: GPT-5.6 Lunaopenai/gpt-5.6-luna

Anthropic: Claude Opus 4.7 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.

MetricAnthropic: Claude Opus 4.7OpenAI: GPT-5.6 Luna
Intelligence Index53.5✓51.2
Coding Index73.6✓71.4
GPQA Diamond91%✓91%
Design Arena Elo1332✓—
Speed (tokens/sec)67✓60
Latency1.7s1.7s✓
Input price /M$5.00$1.00✓
Output price /M$25.00$6.00✓
Context window1M1.1M✓
CapabilitiesReasoningToolsJSONVisionReasoningToolsJSONVision
Anthropic: Claude Opus 4.7 details →OpenAI: GPT-5.6 Luna details →