Claude Sonnet 4.5 Max on SWE-bench Verified: score, rank and what it means
Claude Sonnet 4.5 Max scores 80.2 on SWE-bench Verified, placing it #4 of 600 models in the index. The benchmark average is 57.5 and the leader is GPT-5.2 Pro at 81.7.
Score distribution
The chart shows the top 10 models on SWE-bench Verified, with Claude Sonnet 4.5 Max 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 | Claude Opus 4.5 Pro | Anthropic | 200000 | $20.98 | 89.1 |
| 3 | GPT-5.2 Max | OpenAI | 1000000 | $21.39 | 89.2 |
| 4 | Claude Sonnet 4.5 Max | Anthropic | 1000000 | $19.90 | 87.2 |
| 5 | GPT-5.2 | OpenAI | 2000000 | $19.71 | 88.0 |
| 6 | GPT-5.1 Pro | OpenAI | 200000 | $19.77 | 87.8 |
| 7 | o4 Max | OpenAI | 2000000 | $19.51 | 86.2 |
| 8 | Claude Sonnet 4.5 Reasoning | Anthropic | 400000 | $19.48 | 87.7 |
| 9 | Claude Opus 4.5 Max | Anthropic | 1000000 | $20.90 | 87.8 |
| 10 | Claude Opus 4.5 Reasoning | Anthropic | 2000000 | $20.91 | 88.2 |
What this score means
On SWE-bench Verified, Claude Sonnet 4.5 Max sits at #4 of 600. The leader, GPT-5.2 Pro, scores 81.7, so the gap to the top is 1.5 points. The median model in this index scores 61.0, which puts Claude Sonnet 4.5 Max above the midpoint.
Anthropic models average 71.0 on this benchmark. Claude Sonnet 4.5 Max is 9.2 points above that provider line, so it is a stronger result than the average Anthropic model.
Among frontier models, the average is 75.6. Claude Sonnet 4.5 Max is 4.6 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 80.2 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 $19.90 per million input tokens, Claude Sonnet 4.5 Max is above the median input price of $4.00 across the 600 models scored on SWE-bench Verified. 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 |
|---|---|---|---|---|
| GPT-5.2 Pro | OpenAI | 2000000 | $21.32 | 89.6 |
| Claude Opus 4.5 Pro | Anthropic | 200000 | $20.98 | 89.1 |
| GPT-5.2 Max | OpenAI | 1000000 | $21.39 | 89.2 |
| Claude Sonnet 4.5 Max | Anthropic | 1000000 | $19.90 | 87.2 |
| GPT-5.2 | OpenAI | 2000000 | $19.71 | 88.0 |
| GPT-5.1 Pro | OpenAI | 200000 | $19.77 | 87.8 |
Other benchmarks for Claude Sonnet 4.5 Max
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 86.1 | 50 | 92th | |
| GPQA Diamond | 84.4 | 10 | 98th | |
| HumanEval | 92.4 | 16 | 97th | |
| MATH-500 | 92.8 | 13 | 98th | |
| AIME 2025 | 85.4 | 33 | 95th | |
| LiveCodeBench | 82.8 | 15 | 98th | |
| IFEval | 92.9 | 21 | 97th | |
| TruthfulQA | 87.3 | 30 | 95th | |
| HellaSwag | 93.1 | 20 | 97th | |
| MMMU | 82.0 | 32 | 95th | |
| Arena Elo | 1474.9 | 26 | 96th |
FAQ
What score does Claude Sonnet 4.5 Max get on SWE-bench Verified?
Claude Sonnet 4.5 Max scores 80.2 on SWE-bench Verified in this index. The benchmark average is 57.5 and the top score is 81.7.
How does Claude Sonnet 4.5 Max rank on SWE-bench Verified?
It ranks #4 of 600 models, in the 99th percentile. The leader is GPT-5.2 Pro at 81.7.
Is Claude Sonnet 4.5 Max good at SWE-bench Verified?
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 SWE-bench Verified score calculated?
SWE-bench Verified 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 Sonnet 4.5 Max cost?
Claude Sonnet 4.5 Max costs $19.90 per million input tokens and $95.47 per million output tokens.