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Mercury 2.5

inception/mercury-2.5
  • Inception
  • Family · Mercury 2
  • Released 8 Sep 2026
  • Text → Text
  • Reasoning · adjustable
  • Tools · JSON
Not on OSMEXO yet
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Spec & list price
Context254K
Max output64K
Input / 1M$0.04
Output / 1M$0.153.8× input
Scores · standing
Intelligence12.3#210/489
Usage
Tokens / day2.2B▼ 28% 7d
Usage rank#156
Requests / day458.7K
Tool calls / req0.14
Per request · 30 days
Avg input5.0K0.3× median
Avg output5980.9× median
Cache hit51%0.7× median
Reasoning share72%1.3× median
Tool-call failures0.6%0.3× median

Consumption

3.3B6.7B10.0B2 Oct16 Oct31 Oct
Peak 9.5B 26 SepLow 1.7B 31 OctRank today #156

News & trends

Trending · 14 days

Benchmarks

bar = share of the top score · Benchmark data: Artificial Analysis
Long-context reasoning#128 of 393
71.7%
SciCode#116 of 160
38.5%
Intelligence index#210 of 489
12.3
Humanity's Last Exam#194 of 465
11.8%
Terminal-Bench 4.0#86 of 152
0.0%
Speed · median across providers, latest day
Output speed#19/333171 tok/s2.6× faster than median
First token#760.57 s1.8× quicker than median

#3 cheapest of 31 with a similar score

Value
Intelligence Index
8101214$0.02$0.05$0.1$0.2$0.5Mercury 2.5
Blended price per 1M tokens (log)
Family progress
Intelligence Index
10.51111.51212.5MarAprMayJunJulAugSepMercury 2.5
  • Family releases12.3

Technical details

Reasoning
on · medium
Tokenizer
Other
Moderation
none
Reasoning effort
  • high
  • medium · default
  • low
  • none
Request parameters 10
  • tools
  • tool_choice
  • response_format
  • structured_outputs
  • reasoning
  • reasoning_effort
  • include_reasoning
  • temperature
  • max_tokens
  • stop

When to use

Best for

  • Latency-sensitive chat and autocomplete
  • Fast code suggestions in editors
  • High-volume text generation on a budget
  • Tool calling with structured output

Think twice for

  • Hardest reasoning and research tasks (low scores)
  • Image input (text only)
  • Multi-step autonomous agent runs

Same family

Mercury 2

Alternatives

other vendors · similar capability

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