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Mercury 2.5

ECI
N/A
Inception Labs
Sep. 8, 2026
Closed weights

Mercury 2.5 is a closed-weights model from Inception Labs, released September 8, 2026.

Mercury 2.5 vs select alternatives

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Mercury 2.5
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Closed weights
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Mathematics
ProofBenchBest score 100%
3%
99%
100%
87%
Science
CritPtBest score 32%
0%
32%
31%
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SciCodeBest score 67%
39%
56%
63%
59%
Software engineering
ALE-BenchBest score 2951
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Model metadata

General
OrganizationInception Labs
Release dateSep. 8, 2026
Model accessibilityClosed weights
CountryUnited States of America
Knowledge cutoffUnknown
Provider notesUnknown
Pricing
Input price$0.04 / 1M tokens
Output price$0.15 / 1M tokens
Training
ParametersUnknown
Training computeUnknown
Training hardwareUnknown
Training timeUnknown
Training dataset sizeUnknown