Claude Haiku 4.5 Nano on HumanEval: score, rank and what it means
Claude Haiku 4.5 Nano scores 71.0 on HumanEval, placing it #388 of 600 models in the index. The benchmark average is 74.0 and the leader is GPT-5.2 Pro at 96.8.
Score distribution
The chart shows the top 10 models on HumanEval, with Claude Haiku 4.5 Nano highlighted. Longer bars mean higher scores.
Top 10 leaderboard
| # | Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|---|
| 1 | GPT-5.2 Pro | OpenAI | 2000000 | $21.32 | 89.6 |
| 2 | Gemini 3 Pro Pro | Google DeepMind | 200000 | $19.80 | 87.3 |
| 3 | o4 Max | OpenAI | 2000000 | $19.51 | 86.2 |
| 4 | Grok 4 Reasoning | xAI | 2000000 | $19.67 | 87.8 |
| 5 | Claude Opus 4.5 | Anthropic | 400000 | $19.42 | 87.7 |
| 6 | GPT-5.2 Max | OpenAI | 1000000 | $21.39 | 89.2 |
| 7 | Claude Opus 4.5 Pro | Anthropic | 200000 | $20.98 | 89.1 |
| 8 | Grok 4 Max | xAI | 2000000 | $19.70 | 86.6 |
| 9 | GPT-5.2 Turbo | OpenAI | 1000000 | $20.73 | 87.4 |
| 10 | GPT-5.1 Reasoning | OpenAI | 400000 | $20.27 | 88.3 |
What this score means
On HumanEval, Claude Haiku 4.5 Nano sits at #388 of 600. The leader, GPT-5.2 Pro, scores 96.8, so the gap to the top is 25.8 points. The median model in this index scores 77.4, which puts Claude Haiku 4.5 Nano below the midpoint.
Anthropic models average 86.0 on this benchmark. Claude Haiku 4.5 Nano is 15.0 points below that provider line, so it is a weaker result than the average Anthropic model.
Among mid-range models, the average is 71.5. Claude Haiku 4.5 Nano is 0.5 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 71.0 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 $6.47 per million input tokens, Claude Haiku 4.5 Nano is above the median input price of $4.00 across the 600 models scored on HumanEval. 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 |
|---|---|---|---|---|
| Grok 3 Nano | xAI | 8192 | $7.12 | 67.8 |
| Command A Nano | Cohere | 8192 | $5.90 | 66.3 |
| Reka Flash Mini | Reka AI | 16384 | $5.77 | 65.5 |
| Gemini 2.5 Pro Nano | Google DeepMind | 32768 | $7.28 | 69.2 |
| Claude Haiku 4.5 Nano | Anthropic | 8192 | $6.47 | 68.7 |
| Phi-3.5 Chat | Microsoft | 16384 | $2.64 | 69.0 |
| Sonar Mini | Perplexity | 65536 | $6.52 | 67.9 |
Other benchmarks for Claude Haiku 4.5 Nano
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 73.9 | 355 | 41th | |
| GPQA Diamond | 64.5 | 369 | 39th | |
| SWE-bench Verified | 56.9 | 367 | 39th | |
| MATH-500 | 71.8 | 369 | 39th | |
| AIME 2025 | 63.5 | 361 | 40th | |
| LiveCodeBench | 59.8 | 369 | 39th | |
| IFEval | 78.2 | 363 | 40th | |
| TruthfulQA | 71.6 | 385 | 36th | |
| HellaSwag | 80.5 | 378 | 37th | |
| MMMU | 64.3 | 386 | 36th | |
| Arena Elo | 1332.1 | 385 | 36th |
FAQ
What score does Claude Haiku 4.5 Nano get on HumanEval?
Claude Haiku 4.5 Nano scores 71.0 on HumanEval in this index. The benchmark average is 74.0 and the top score is 96.8.
How does Claude Haiku 4.5 Nano rank on HumanEval?
It ranks #388 of 600 models, in the 35th percentile. The leader is GPT-5.2 Pro at 96.8.
Is Claude Haiku 4.5 Nano good at HumanEval?
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 HumanEval score calculated?
HumanEval is a coding 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 Haiku 4.5 Nano cost?
Claude Haiku 4.5 Nano costs $6.47 per million input tokens and $27.98 per million output tokens.