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ChatGPT vs Pi
Compare ChatGPT vs Pi: pricing, context window, benchmarks (coding, math, reasoning), capabilities. Updated April 2026.
Open in compare tool — pick different models →ChatGPT
chatgpt.com ↗ Pi
pi.ai ↗ Pricing
Free tier
Limited GPT-5 mini, ~10 GPT-5 messages/day
Fully free, no paid tier
Standard plan
Plus — $20/mo
Free — API only
Top plan
Pro — $200/mo
API only — API only
API input / 1M tokens
$5.00
$2.50 Best
API output / 1M tokens
$15.00
$10.00 Best
Capability
Context window
256K Best
32K
Max output tokens
16K Best
4K
Knowledge cutoff
2026-01
2025-08
Benchmarks
Coding (LiveCodeBench)
72% Best
—
Math (AIME 2025)
84% Best
55%
Reasoning (GPQA Diamond)
79% Best
62%
Human pref. (LMArena Elo)
1410 Best
1280
Features
Image input
✓
—
Voice mode
✓
✓
Web search
✓
Partial
File upload
✓
—
Image generation
✓
—
Code execution
✓
—
Agent / tool use
✓
—
Persistent memory
✓
✓
ChatGPT
Best all-rounder. Strongest agent tooling (custom GPTs, code interpreter, browse).
Pi
Conversational and EQ-focused. Best voice mode in 2024–2025 (six warm voices). Limited capability vs frontier models. Now part of Microsoft after Inflection acqui-hire.
Or skip the choice
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