Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Fable 5
96
Gemini 2.5 Pro
63
Verified leaderboard positions: Claude Fable 5 #2 · Gemini 2.5 Pro unranked
Pick Claude Fable 5 if you want the stronger benchmark profile. Gemini 2.5 Pro only becomes the better choice if you want the cheaper token bill or you would rather avoid the extra latency and token burn of a reasoning model.
Coding
+21.8 difference
Knowledge
+34.0 difference
Claude Fable 5
Gemini 2.5 Pro
$10 / $50
$1.25 / $10
N/A
117 t/s
N/A
21.19s
1M+
1M
Pick Claude Fable 5 if you want the stronger benchmark profile. Gemini 2.5 Pro only becomes the better choice if you want the cheaper token bill or you would rather avoid the extra latency and token burn of a reasoning model.
Claude Fable 5 is clearly ahead on the provisional aggregate, 96 to 63. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Fable 5's sharpest advantage is in knowledge, where it averages 74.8 against 40.8. The single biggest benchmark swing on the page is HLE, 64.5% to 18.8%.
Claude Fable 5 is also the more expensive model on tokens at $10.00 input / $50.00 output per 1M tokens, versus $1.25 input / $10.00 output per 1M tokens for Gemini 2.5 Pro. That is roughly 5.0x on output cost alone. Claude Fable 5 is the reasoning model in the pair, while Gemini 2.5 Pro is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Claude Fable 5 gives you the larger context window at 1M+, compared with 1M for Gemini 2.5 Pro.
Claude Fable 5 is ahead on BenchLM's provisional leaderboard, 96 to 63. The biggest single separator in this matchup is HLE, where the scores are 64.5% and 18.8%.
Claude Fable 5 has the edge for knowledge tasks in this comparison, averaging 74.8 versus 40.8. Inside this category, HLE is the benchmark that creates the most daylight between them.
Claude Fable 5 has the edge for coding in this comparison, averaging 85.6 versus 63.8. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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