Claude Opus 5 Max vs GPT-6.1 Terra Max compared

Claude Opus 5 (Max) (Anthropic) and GPT-6.1 Terra (Max) (OpenAI) meet here on their recorded benchmark, price and speed data. This page is written automatically from catalogue numbers only: benchmark scores, list prices and measured speed. Price separates them more than anything else; on a blended basis Claude Opus 5 Max costs 5 times as much as GPT-6.1 Terra Max.

Price per token

Per million tokens, Claude Opus 5 Max charges $5.00 for input and $25.00 for output, while GPT-6.1 Terra Max charges $1.00 and $5.00. That makes GPT-6.1 Terra Max's output 80% cheaper.

For a sample workload of 1 million input tokens and 200,000 output tokens, Claude Opus 5 Max would cost $10.00 and GPT-6.1 Terra Max $2.00, a difference of $8.00. A bigger example, summarising 1,000 documents of 8,000 tokens into 400-token summaries, costs $50.00 on Claude Opus 5 Max and $10.00 on GPT-6.1 Terra Max: a gap of $40.00. Blended at three input tokens per output token, the effective rates are $10.00 for Claude Opus 5 Max and $2.00 for GPT-6.1 Terra Max.

When they came out

GPT-6.1 Terra Max arrived on October 26, 2026, about 3 months after Claude Opus 5 Max (July 24, 2026).

Benchmark scores

GPT-6.1 Terra Max comes out ahead on the intelligence index, 51.3 to 44.2. That is a clear margin for an index that averages many evaluations.

Across the 109 active models with an intelligence score in the catalogue, Claude Opus 5 Max ranks 26th and GPT-6.1 Terra Max ranks 14th.

Neither model has a separate coding or math index recorded yet, so those narrower comparisons will have to wait for more data.

Speed and latency

Claude Opus 5 Max generates about 50 tokens per second and GPT-6.1 Terra Max about 114 tokens per second. GPT-6.1 Terra Max is ahead by 129% on throughput. The wait for the first token averages 62 seconds on Claude Opus 5 Max against 6.2 minutes on GPT-6.1 Terra Max. GPT-6.1 Terra Max writes faster once it starts, but Claude Opus 5 Max's head start is large enough that Claude Opus 5 Max still finishes first at any typical reply length; GPT-6.1 Terra Max only catches up beyond about 27,000 tokens. Waits that long are felt on every chat-style request, though they matter less for batch jobs.

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, 6.3 minutes for GPT-6.1 Terra Max.

Is the price in proportion?

A blunt value measure, blended price over intelligence score, puts Claude Opus 5 Max at $0.23 and GPT-6.1 Terra Max at $0.039 per point. With the higher score and the lower cost per point, GPT-6.1 Terra Max is the better value per point on these numbers.