Head-to-head AI model comparison graphic: Claude Fable 5.2 (Anthropic) vs GPT-6.1 Terra (OpenAI). Intelligence index 64.6 vs 51.3; output speed 95 vs 103 tokens per second; time to first token 4.2 min vs 4.8 min; output price $40.00 vs $5.00 per million tokens; input price $8.00 vs $1.00 per million tokens. franklineh.com
Claude Fable 5.2 vs GPT-6.1 Terra: head-to-head AI benchmark comparison. GPT-6.1 Terra leads on output speed, output price and input price; Claude Fable 5.2 leads on intelligence index and time to first token.
Head to headBy Franklin AIUpdated

Claude Fable 5.2 (Max, Default Fallback) vs GPT-6.1 Terra (Max) benchmark comparison

Claude Fable 5.2 (Max, Default Fallback) vs GPT-6.1 Terra (Max) scores 64.6 and 51.3 on the captured intelligence index. Compare token rates and response timing.

Pick it for Claude Fable 5.2 · Max, Default Fallback

  • Evaluate Fable on difficult cases where the aggregate score suggests a trial.

Pick it for GPT-6.1 Terra · Max

  • Measure Terra on sustained generation with a clear unit-cost target.

By the numbers

These figures describe the two model configurations shown here. A dash means the source snapshot had no usable figure for that metric. Scores, speed and API pricing may change as providers update models.

MetricClaude Fable 5.2 (Max, Default Fallback)GPT-6.1 Terra (Max)
Intelligence Index64.651.3
Input price (per 1M tokens)$8.00$1.00
Output price (per 1M tokens)$40.00$5.00
Output speed (tokens/s)95103
Time to first token4.2 min4.8 min
Release date2026-11-092026-10-26

The current benchmark capture reports aggregate intelligence indices of 64.6 for Claude Fable 5.2 (Max, Default Fallback) and 51.3 for GPT-6.1 Terra (Max).

Terra’s unit rates are one-eighth of Fable’s

Terra lists $1 input and $5 output per million tokens against $8 and $40 for Fable. Fable leads the captured index and starts sooner. Terra generates output at a higher measured rate once its response begins.

What to measure on your workload

Compare the cost to complete a batch of accepted requests, including any retries. The rates describe tokens rather than the total price of solving a task. The two timing figures should be checked separately at the expected response lengths.

Questions about Claude Fable 5.2 and GPT-6.1 Terra

How long does each variant take to start responding?

The captured time to first token is 253.38 seconds for Claude Fable 5.2 (Max, Default Fallback) and 288.85 seconds for GPT-6.1 Terra (Max).

What is the measured output speed?

Captured output throughput is 94.67 tokens per second for Claude Fable 5.2 (Max, Default Fallback) and 103.35 tokens per second for GPT-6.1 Terra (Max).

What release dates does the benchmark record list?

Claude Fable 5.2 has a recorded release date of 2026-11-09. GPT-6.1 Terra has a recorded release date of 2026-10-26.

Final whistle

Terra lists $1 input and $5 output per million tokens against $8 and $40 for Fable. Fable leads the captured index and starts sooner. Terra generates output at a higher measured rate once its response begins.

Where the numbers come from

The scores, speed and prices in this comparison come from independent third-party model evaluations that Franklin AI syncs each day, and the article was written from a snapshot of them. For the latest results, open the Claude Fable 5.2 (Max, Default Fallback) and GPT-6.1 Terra (Max) pages. The AI Benchmark methodology explains how that data is collected and shown.

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