This matchup crosses tiers: GPT-6 Astra (Max) from OpenAI against Claude Opus 5 (Max) from Anthropic. GPT-6 Astra Max leads the intelligence index 56.9 to 44.2, a gap of 12.7 points. The figures come from tracked catalogue data, not from our own testing, so treat them as a starting point for a trial on your tasks.
Overall capability: 12.7 points apart
The catalogue puts Claude Opus 5 Max at 44.2 and GPT-6 Astra Max at 56.9 on its intelligence index. This is a substantial lead, not a near miss.
Among 109 active scored models, Claude Opus 5 Max sits 26th and GPT-6 Astra Max 5th.
The catalogue does not yet split either model's score into coding and math indexes.
Throughput and time to first token
Once a response is under way, Claude Opus 5 Max produces roughly 50 tokens per second against 46 tokens per second for GPT-6 Astra Max. Claude Opus 5 Max is ahead by 8% on throughput. Before any text appears, Claude Opus 5 Max takes 62 seconds and GPT-6 Astra Max 6.8 minutes. GPT-6 Astra Max waits 6.6 times as long before its first token. A first-token wait of that length suits background work better than live conversation.
Add the two numbers up for a 1,000-token reply and Claude Opus 5 Max finishes first: 82 seconds for Claude Opus 5 Max, 7.2 minutes for GPT-6 Astra Max.
What they cost
Per million tokens, Claude Opus 5 Max charges $5.00 for input and $25.00 for output, while GPT-6 Astra Max charges $10.00 and $50.00. GPT-6 Astra Max costs twice as much per output token.
For a sample workload of 1 million input tokens and 200,000 output tokens, Claude Opus 5 Max would cost $10.00 and GPT-6 Astra Max $20.00, a difference of $10.00. Scale it up to an agent that reads 50 million tokens and writes 5 million in a month and the bill is $375 for Claude Opus 5 Max against $750 for GPT-6 Astra Max.
Is the price in proportion?
Dividing the blended price by the intelligence index gives a rough cost per point: $0.23 for Claude Opus 5 Max and $0.35 for GPT-6 Astra Max, per million tokens. GPT-6 Astra Max costs 1.6 times as much per point, which is the price of its lead.
When they came out
GPT-6 Astra Max arrived on September 3, 2026, 41 days after Claude Opus 5 Max (July 24, 2026). That is close enough to count them as the same generation.

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