Claude Opus 5 (Adaptive Reasoning, Max Effort) vs GPT-6 Astra (high)

Anthropic · OpenAI · catalog 2026-09-14

Trade-off: Claude Opus 5 (Adaptive Reasoning, Max Effort) is cheaper ($3.85 vs $7.7/M); GPT-6 Astra (high) scores higher on intelligence (51 vs 50.7).

	Claude Opus 5 (Adaptive Reasoning, Max Effort)	GPT-6 Astra (high)
Speed (tok/s)	50.4 measured	49.8 measured
Blended $/M	$3.85 derived	$7.7 derived
Intelligence index	50.7 measured	51 measured
TTFT (ms)	5838 measured	3369 measured
Context	1000k list	—
Coding index	78 measured	77 measured
Agentic index	56 measured	49 measured

Claude Opus 5 (Adaptive Reasoning, Max Effort) card · GPT-6 Astra (high) card · 3D observatory

Verdicts use price×intelligence dominance only, and only where both sides are measured; null cells stay null with their provenance (em-dash = not in catalog). Percentile-free by design — this page compares two models, not the field. Generated page — do not hand-edit.