Leaderboard · Model · Updated
Claude 3.5 Sonnet
Long-time community favourite for coding and writing.
At a glance
| Provider | Anthropic |
|---|---|
| Released | 2024-10 |
| Tier | general-purpose |
| License | Closed / proprietary |
| Modalities | text, image |
| Context window | 200k tokens |
| Max output | 8.192k tokens |
| API price · input | $3.00 / 1M tokens |
| API price · output | $15.00 / 1M tokens |
Benchmark performance
How Claude 3.5 Sonnet stacks up against the current leader (GPT-5) and the median model in the leaderboard:
| Benchmark | Claude 3.5 Sonnet | GPT-5 | Median |
|---|---|---|---|
| Chatbot Arena Elo | 1320 | 1410 | 1320 |
| MMLU-Pro | 78.0 | 86.8 | 78.0 |
| GPQA Diamond | 65.0 | 87.3 | 65.0 |
| MATH | 78.3 | 96.7 | 78.3 |
| HumanEval | 92.0 | 95.1 | 92.0 |
| SWE-Bench Verified | 49.0 | 74.9 | 49.0 |
Numbers compiled from provider technical reports and Chatbot Arena. See methodology for the composite-score formula.
OpenRouter routes your requests across Claude 3.5 Sonnet, GPT-5, Claude, Gemini, and 100+ other models behind a single API key — pay-as-you-go, no monthly minimum. Try OpenRouter → (affiliate · supports this site)
What does Claude 3.5 Sonnet cost in practice?
API pricing is $3.00 per 1M input tokens and $15.00 per 1M output tokens. Assuming a 50/50 input/output split, here is what that looks like at three workload sizes:
| Volume | Per day | Per month | Per year |
|---|---|---|---|
| 1M tokens/day | $9.00 | $270.00 | $3,285 |
| 10M tokens/day | $90.00 | $2,700 | $32,850 |
| 100M tokens/day | $900.00 | $27,000 | $328,500 |
Strengths & weaknesses
Where it shines
No clear top-tier strengths — this is a mid-pack model.
Where it lags
- SWE-Bench: 49.0 (rank #13 of 18, mid-pack)
- MATH: 78.3 (rank #20 of 29, mid-pack)
Best alternatives
The closest models to Claude 3.5 Sonnet by tier and benchmark score:
| Model | Score | $ in / out | Context | Action |
|---|---|---|---|---|
| Gemini 1.5 Pro |
67.9 | $1.25 / $5.00 | 2M | Try → · vs Claude |
| GPT-4o OpenAI |
66.8 | $2.50 / $10.00 | 128k | Try → · vs Claude |
| Mistral Large 2 Mistral AI |
63.7 | $2.00 / $6.00 | 128k | Try → · vs Claude |
| GPT-4.1 OpenAI |
74.5 | $2.00 / $8.00 | 1M | Try → · vs Claude |
| Claude 3.7 Sonnet Anthropic |
76.0 | $3.00 / $15.00 | 200k | Try → · vs Claude |
Frequently asked questions
Is Claude 3.5 Sonnet a good model?
Claude 3.5 Sonnet scores 69.1 on the llmrank.top composite (rank #16 of 30). It trails the frontier — for top performance, look at GPT-5 (86.0). Whether it's the right fit depends on your workload — see the use-case discussion on this page.
How much does Claude 3.5 Sonnet cost?
Claude 3.5 Sonnet is priced at $3.00 per 1M input tokens and $15.00 per 1M output tokens (USD). For a 10M-token-per-day workload split 50/50, that works out to roughly $90.00/day or $32,850/year.
What is Claude 3.5 Sonnet's context window?
200k tokens. That covers most multi-document workloads.
Is Claude 3.5 Sonnet open source?
No — it is a closed (proprietary) model accessed only via the provider API.
What is Claude 3.5 Sonnet's SWE-Bench score?
Claude 3.5 Sonnet scores 49.0% on SWE-Bench Verified — the benchmark that measures real-world GitHub issue resolution. Its Chatbot Arena Elo is 1320.
What are the best alternatives to Claude 3.5 Sonnet?
Closest alternatives by tier and score: Gemini 1.5 Pro, GPT-4o, Mistral Large 2. See the alternatives section on this page for side-by-side numbers.
Related: Gemini 1.5 Pro · GPT-4o · Mistral Large 2 · Full leaderboard
Spotted out-of-date numbers? Open an issue — corrections usually ship within 24h.
Try Claude 3.5 Sonnet now
Direct link to the official playground — or use OpenRouter to A/B test it against any other model on a single API key.