Compare · ModelsLive · 2 picked · head to head
Phi 3.5 Mini Instruct vs Grok 4 Fast
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Grok 4 Fast wins on 0/0 benchmarks
Not enough overlapping benchmarks to declare a winner yet · Phi 3.5 Mini Instruct · Grok 4 Fast are still filling in scores.
Hype vs Reality
Attention vs performance
Phi 3.5 Mini Instruct
#192 by perf·no signal
Grok 4 Fast
#93 by perf·no signal
Vendor risk
Who is behind the model
Microsoft
$3.00T·Big Tech
xAI
$250.0B·Tier 1
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| Phi 3.5 Mini Instruct | — | — | — | — |
| Grok 4 Fast | $0.20 | $0.50 | 2.0M tokens (~1,000 books) | $2.75 |