Claude 3.5 Haiku vs Phi 4 Reasoning Plus
Phi 4 Reasoning Plus leads the LLM Stats Score 15.0 to 5.2.
Anthropic · Microsoft · Updated for 2026
Which is better?
Phi 4 Reasoning Plus leads the overall LLM Stats Score 15.0 to 5.2, ranking #230 overall.
In the 2 individual benchmarks reported for both models, Phi 4 Reasoning Plus wins 2; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude 3.5 Haiku
- you want predictable pricing at $0.80/M input and $4.00/M output
Choose Phi 4 Reasoning Plus
- overall performance matters — it scores 15.0 and ranks #230 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you want the most recent training data — it shipped Apr 2025
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
9 reported for Claude 3.5 Haiku · 11 for Phi 4 Reasoning Plus
Claude 3.5 Haiku outperforms in 0 benchmarks, while Phi 4 Reasoning Plus is better at 2 benchmarks (GPQA, MMLU-Pro).
Phi 4 Reasoning Plus significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only Claude 3.5 Haiku specifies input context (200,000 tokens). Only Claude 3.5 Haiku specifies output context (200,000 tokens).
License
Usage and distribution terms
Claude 3.5 Haiku is licensed under a proprietary license, while Phi 4 Reasoning Plus uses MIT.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
MIT
Open weights
Release Timeline
When each model was launched
Claude 3.5 Haiku was released on 2024-10-22, while Phi 4 Reasoning Plus was released on 2025-04-30.
Phi 4 Reasoning Plus is 6 months newer than Claude 3.5 Haiku.
Oct 22, 2024
1.9 years ago
Apr 30, 2025
1.4 years ago
6mo newerKnowledge Cutoff
When training data ends
Phi 4 Reasoning Plus has a documented knowledge cutoff of 2025-03-01, while Claude 3.5 Haiku's cutoff date is not specified.
We can confirm Phi 4 Reasoning Plus's training data extends to 2025-03-01, but cannot make a direct comparison without Claude 3.5 Haiku's cutoff date.
—
Mar 2025
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude 3.5 Haiku and Phi 4 Reasoning Plus side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude 3.5 Haiku vs Phi 4 Reasoning Plus.