Phi-3.5 Base on IFEval: score, rank and what it means
Phi-3.5 Base scores 74.2 on IFEval, placing it #404 of 600 models in the index. The benchmark average is 78.6 and the leader is Claude Opus 4.5 Pro at 96.1.
Score distribution
The chart shows the top 10 models on IFEval, with Phi-3.5 Base highlighted. Longer bars mean higher scores.
Top 10 leaderboard
| # | Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|---|
| 1 | Claude Opus 4.5 Pro | Anthropic | 200000 | $20.98 | 89.1 |
| 2 | Claude Opus 4.5 Reasoning | Anthropic | 2000000 | $20.91 | 88.2 |
| 3 | GPT-5.2 Pro | OpenAI | 2000000 | $21.32 | 89.6 |
| 4 | GPT-5.2 Max | OpenAI | 1000000 | $21.39 | 89.2 |
| 5 | GPT-5.2 Reasoning | OpenAI | 1000000 | $20.98 | 87.5 |
| 6 | GPT-5.1 Pro | OpenAI | 200000 | $19.77 | 87.8 |
| 7 | Gemini 3 Pro Max | Google DeepMind | 2000000 | $20.57 | 87.9 |
| 8 | GPT-5.1 Reasoning | OpenAI | 400000 | $20.27 | 88.3 |
| 9 | Claude Opus 4.5 Max | Anthropic | 1000000 | $20.90 | 87.8 |
| 10 | o4 Reasoning | OpenAI | 1000000 | $19.69 | 87.5 |
What this score means
On IFEval, Phi-3.5 Base sits at #404 of 600. The leader, Claude Opus 4.5 Pro, scores 96.1, so the gap to the top is 21.9 points. The median model in this index scores 81.2, which puts Phi-3.5 Base below the midpoint.
Microsoft models average 72.4 on this benchmark. Phi-3.5 Base is 1.8 points above that provider line, so it is a stronger result than the average Microsoft model.
Among open-weight models, the average is 77.0. Phi-3.5 Base is 2.8 points below that group. This is the more useful comparison if you are shortlisting within the same tier rather than across the whole index.
Read a 74.2 as a relative signal, not an absolute guarantee. Benchmark scores depend on prompt format, evaluation harness and contamination controls. Use this page to narrow the shortlist, then test the model on your own data.
Price context
At $2.24 per million input tokens, Phi-3.5 Base is below the median input price of $4.00 across the 600 models scored on IFEval. The models immediately around it in the ranking are shown below so you can compare score and price together.
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| StableLM 2 Chat | Stability AI | 8192 | $1.79 | 64.6 |
| Reka Core Nano | Reka AI | 16384 | $5.45 | 65.1 |
| Nemotron Nano | NVIDIA | 8192 | $2.24 | 66.6 |
| Nemotron Nano Chat | NVIDIA | 32768 | $2.21 | 66.2 |
| Phi-3.5 Base | Microsoft | 65536 | $2.24 | 66.6 |
| Nova Pro Nano | Amazon | 8192 | $5.44 | 65.4 |
| SmolLM3 Instruct | Hugging Face | 8192 | $1.69 | 63.6 |
Other benchmarks for Phi-3.5 Base
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 72.4 | 379 | 37th | |
| GPQA Diamond | 60.3 | 402 | 33th | |
| SWE-bench Verified | 51.6 | 409 | 32th | |
| HumanEval | 73.1 | 371 | 38th | |
| MATH-500 | 71.6 | 373 | 38th | |
| AIME 2025 | 59.7 | 389 | 35th | |
| LiveCodeBench | 55.2 | 401 | 33th | |
| TruthfulQA | 73.0 | 370 | 38th | |
| HellaSwag | 79.5 | 389 | 35th | |
| MMMU | 61.7 | 412 | 31th | |
| Arena Elo | 1315.0 | 400 | 33th |
FAQ
What score does Phi-3.5 Base get on IFEval?
Phi-3.5 Base scores 74.2 on IFEval in this index. The benchmark average is 78.6 and the top score is 96.1.
How does Phi-3.5 Base rank on IFEval?
It ranks #404 of 600 models, in the 33rd percentile. The leader is Claude Opus 4.5 Pro at 96.1.
Is Phi-3.5 Base good at IFEval?
It is below the median for this benchmark, so test it carefully before relying on it for this capability. The result should be read alongside its price and context window.
How is the IFEval score calculated?
IFEval is a instruction following benchmark. Scores in this index are modelled estimates on a 0–100 scale (or Elo for Arena), derived from capability tier and benchmark difficulty. They are not official leaderboard results.
What does Phi-3.5 Base cost?
Phi-3.5 Base costs $2.24 per million input tokens and $10.25 per million output tokens.