Claude Sonnet 4.5 vs GPT-4o mini
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Claude Sonnet 4.5
65.5Anthropic · Sep 2025
The model that made 30-hour autonomous coding sessions real — 77.2% SWE-bench Verified and a 1M-token context beta at $3/$15.
GPT-4o mini
OpenAI · Jul 2024
The 2024 budget classic that defined the cheap-LLM tier; GPT-5 nano and mini have since taken its crown.
The verdict
These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: GPT-4o mini works out roughly 23x cheaper per blended million tokens. Claude Sonnet 4.5 also takes 200K of context versus 128K for GPT-4o mini.
Specs & pricing
| Claude Sonnet 4.5 | GPT-4o mini | |
|---|---|---|
| modhub Index | 65.5 | — |
| Input price / 1M | $3 | $0.15 |
| Output price / 1M | $15 | $0.6 |
| Context window | 200K | 128K |
| Max output | 64K | 16K |
| Open weights | no | no |
| Reasoning model | yes | no |
| Multimodal input | text, image | text, image |
| Knowledge cutoff | Jan 2025 | Oct 2023 |
| Released | Sep 2025 | Jul 2024 |
| Example monthly cost* | $52.50 | $2.40 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Claude Sonnet 4.5 or GPT-4o mini?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: GPT-4o mini works out roughly 23x cheaper per blended million tokens. Claude Sonnet 4.5 also takes 200K of context versus 128K for GPT-4o mini.
- Which is cheaper, Claude Sonnet 4.5 or GPT-4o mini?
- Claude Sonnet 4.5 costs $3/$15 per million input/output tokens, while GPT-4o mini costs $0.15/$0.6. For a typical workload of 10M input and 1.5M output tokens per month, that's $52.50 versus $2.40.
- Which model is better for coding, Claude Sonnet 4.5 or GPT-4o mini?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.
More comparisons
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