Claude Fable 5$22.000/MClaude Opus 4.8$11.000/MClaude Opus 4.7$11.000/MClaude Opus 4.6$11.000/MClaude Opus 4.5$33.000/MClaude Sonnet 3.7$6.600/MClaude Opus 3$33.000/MClaude 2.1$12.800/MClaude 2$12.800/MGPT-5.5$12.500/MGPT-5.2$5.425/MGPT-5.2-Codex$5.425/MGPT-5$3.875/MGPT-4.5$97.500/MGPT-4 Turbo Preview$16.000/MGPT-4$39.000/MGPT-4-32k$78.000/Mo3$19.000/Mo3-mini$2.090/Mo4-mini$2.090/Mo1$28.500/Mo1-mini$5.700/Mo1-preview$28.500/MGemini 3.5 Pro$5.000/MGemini 3.1 Pro$5.000/MGemini 3 Pro$5.000/MGemini 2.5 Pro$3.875/MGemini 1.5 Pro$2.375/MGemini 1.0 Ultra$12.000/MGemini 1.0 Pro$0.800/MClaude Fable 5$22.000/MClaude Opus 4.8$11.000/MClaude Opus 4.7$11.000/MClaude Opus 4.6$11.000/MClaude Opus 4.5$33.000/MClaude Sonnet 3.7$6.600/MClaude Opus 3$33.000/MClaude 2.1$12.800/MClaude 2$12.800/MGPT-5.5$12.500/MGPT-5.2$5.425/MGPT-5.2-Codex$5.425/MGPT-5$3.875/MGPT-4.5$97.500/MGPT-4 Turbo Preview$16.000/MGPT-4$39.000/MGPT-4-32k$78.000/Mo3$19.000/Mo3-mini$2.090/Mo4-mini$2.090/Mo1$28.500/Mo1-mini$5.700/Mo1-preview$28.500/MGemini 3.5 Pro$5.000/MGemini 3.1 Pro$5.000/MGemini 3 Pro$5.000/MGemini 2.5 Pro$3.875/MGemini 1.5 Pro$2.375/MGemini 1.0 Ultra$12.000/MGemini 1.0 Pro$0.800/M
BETA
Subscribe
← Back to Index·All Inflection AI models
Inflection AI
Inflection AIFrontier

Pi (Inflection-2.5)

Conversational

Inflection's Pi assistant model (v2.5). After Microsoft's 2024 licensing deal absorbed most of the Inflection team, Pi continues as an enterprise emotional-intelligence assistant.

Pi (Inflection-2.5) is a frontier AI model from Inflection AI. It costs $2.500 per million input tokens and $10.000 per million output tokens (blended $4.750/M), with a 32K-token context window.

Released Mar 2024Modalities textOfficial model page ↗Compare with another model →Estimate monthly cost →
INPUT
$2.500/M
per million input tokens
OUTPUT
$10.000/M
per million output tokens
BLENDED 70/30
$4.750/M
default reference rate · how it's calculated →
CONTEXT
32K
32,000 tokens
What it's good at
  • Conversational warmth
  • Long memory
  • Tuned for assistant use
Typical use cases
  • Consumer companion / coaching apps
  • Emotional-intelligence enterprise chat
Benchmarks
vs. best public score
MMLU73%
Multitask academic knowledge across 57 subjects.
LMArena Elo1163 Elo
Crowd-sourced head-to-head preference Elo rating.
Hand-curated from each provider's published reports and public leaderboards. Methodology varies across sources — treat as directional rather than authoritative.
Frequently asked questions

How much does Pi (Inflection-2.5) cost?

Pi (Inflection-2.5) costs $2.500 per million input tokens and $10.000 per million output tokens, for a blended reference rate of $4.750 per million tokens.

What is Pi (Inflection-2.5)'s context window?

Pi (Inflection-2.5) supports up to 32K tokens of context (32,000 tokens).

What is Pi (Inflection-2.5) best for?

Pi (Inflection-2.5) is well suited to Conversational warmth, Long memory and Tuned for assistant use.

Who makes Pi (Inflection-2.5)?

Pi (Inflection-2.5) is developed and served by Inflection AI. It was released in Mar 2024.