Claude Sonnet 4.5 Mini on IFEval: score, rank and what it means
Claude Sonnet 4.5 Mini scores 85.8 on IFEval, placing it #162 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 Claude Sonnet 4.5 Mini 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, Claude Sonnet 4.5 Mini sits at #162 of 600. The leader, Claude Opus 4.5 Pro, scores 96.1, so the gap to the top is 10.3 points. The median model in this index scores 81.2, which puts Claude Sonnet 4.5 Mini above the midpoint.
Anthropic models average 88.3 on this benchmark. Claude Sonnet 4.5 Mini is 2.5 points below that provider line, so it is a weaker result than the average Anthropic model.
Among multimodal models, the average is 85.2. Claude Sonnet 4.5 Mini is 0.6 points above that group. This is the more useful comparison if you are shortlisting within the same tier rather than across the whole index.
Read a 85.8 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 $11.43 per million input tokens, Claude Sonnet 4.5 Mini is above 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 |
|---|---|---|---|---|
| Llama 3.1 Turbo Instruct | Together AI | 32768 | $4.21 | 76.7 |
| Reka Core Pro | Reka AI | 65536 | $13.44 | 79.9 |
| Codestral | Mistral AI | 65536 | $4.19 | 77.6 |
| ERNIE 4.0 Max | Baidu | 32768 | $12.40 | 78.9 |
| Claude Sonnet 4.5 Mini | Anthropic | 32768 | $11.43 | 76.5 |
| DeepSeek-Coder Chat | DeepSeek | 200000 | $4.20 | 77.3 |
| GLM-4.5 | Zhipu AI | 200000 | $4.55 | 78.2 |
Other benchmarks for Claude Sonnet 4.5 Mini
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 77.3 | 267 | 56th | |
| GPQA Diamond | 69.5 | 278 | 54th | |
| SWE-bench Verified | 68.1 | 144 | 76th | |
| HumanEval | 80.9 | 215 | 64th | |
| MATH-500 | 78.6 | 246 | 59th | |
| AIME 2025 | 69.1 | 277 | 54th | |
| LiveCodeBench | 72.8 | 132 | 78th | |
| TruthfulQA | 81.1 | 154 | 74th | |
| HellaSwag | 86.4 | 197 | 67th | |
| MMMU | 71.8 | 248 | 59th | |
| Arena Elo | 1403.3 | 199 | 67th |
FAQ
What score does Claude Sonnet 4.5 Mini get on IFEval?
Claude Sonnet 4.5 Mini scores 85.8 on IFEval in this index. The benchmark average is 78.6 and the top score is 96.1.
How does Claude Sonnet 4.5 Mini rank on IFEval?
It ranks #162 of 600 models, in the 73rd percentile. The leader is Claude Opus 4.5 Pro at 96.1.
Is Claude Sonnet 4.5 Mini good at IFEval?
Yes, relative to the index: it is above the median and inside the top half of scores. 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 Claude Sonnet 4.5 Mini cost?
Claude Sonnet 4.5 Mini costs $11.43 per million input tokens and $50.28 per million output tokens.