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Microsoft Copilot vs Pi
Compare Microsoft Copilot vs Pi: pricing, context window, benchmarks (coding, math, reasoning), capabilities. Updated April 2026.
Open in compare tool — pick different models →Microsoft Copilot
copilot.microsoft.com ↗ Pi
pi.ai ↗ Pricing
Free tier
Free GPT-5 access via Bing — most generous of frontier-tier
Fully free, no paid tier
Standard plan
Copilot Pro — $20/mo
Free — API only
Top plan
Microsoft 365 Copilot — $30/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
128K Best
32K
Max output tokens
8K Best
4K
Knowledge cutoff
2026-01
2025-08
Benchmarks
Coding (LiveCodeBench)
68% Best
—
Math (AIME 2025)
82% Best
55%
Reasoning (GPQA Diamond)
76% Best
62%
Human pref. (LMArena Elo)
1382 Best
1280
Features
Image input
✓
—
Voice mode
✓
✓
Web search
✓
Partial
File upload
✓
—
Image generation
✓
—
Code execution
✓
—
Agent / tool use
✓
—
Persistent memory
Partial
✓
Microsoft Copilot
Tightest M365 integration (Word, Excel, Teams, Outlook). Free GPT-5 in Bing Chat. Slightly weaker on benchmarks than ChatGPT due to safety tuning.
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.
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