Cheaper alternatives to Claude Sonnet 5
Claude Sonnet 5 scores 1442 on the overall Arena and costs about $800.00/month at 100,000 calls (1,500 in / 500 out). Here are models that match or beat it on quality for less.
| GLM-5.3-Flash | 1472 | $23.75 | $776.25/mo | Z.ai (Zhipu AI) |
| DeepSeek V4 Pro | 1444 | $108.75 | $691.25/mo | DeepSeek |
| MiMo-V2.5-Pro | 1465 | $108.75 | $691.25/mo | Xiaomi |
| Gemini 3 Flash | 1442 | $180.00 | $620.00/mo | |
| Qwen3.7 Plus | 1454 | $225.00 | $575.00/mo | Alibaba |
| Kimi K2.5 | 1446 | $240.00 | $560.00/mo | Moonshot AI |
| Kimi K2.5 (Bedrock) | 1446 | $240.00 | $560.00/mo | AWS Bedrock |
| Gemini 3.6 Flash | 1476 | $300.00 | $500.00/mo | |
| Gemini 3.7 Flash | 1490 | $300.00 | $500.00/mo | |
| Gemini 3.8 Flash | 1495 | $300.00 | $500.00/mo | |
| GLM-5 | 1446 | $310.00 | $490.00/mo | Z.ai (Zhipu AI) |
| GLM-5 (Bedrock) | 1446 | $310.00 | $490.00/mo | AWS Bedrock |
Intelligence scores are community Arena ratings from LMArena / arena.ai, used under CC BY 4.0. Snapshot last refreshed 18 September 2026. Scores are a relative signal, not an absolute measure of capability. A Measured score was voted on directly; an Estimated score is inherited from an identical base model (a regional/creator-prefixed hosting duplicate). See our methodology.
FAQ
Is there a cheaper model as good as Claude Sonnet 5?
Yes. GLM-5.3-Flash matches or beats Claude Sonnet 5 on the overall Arena leaderboard and costs about $23.75/month versus $800.00/month at a typical volume of 100,000 calls — saving roughly $776.25/month.
How is 'as good' defined?
We only list models with an overall Arena score at or above Claude Sonnet 5's (1442). Arena scores are community preference ratings, not a single benchmark — confirm the alternative on your own task before switching.
Cite / link to this page
You’re welcome to reference this page and its figures with attribution and a link back.
https://aicalculatorpro.com/alternatives/claude-sonnet-5/<a href="https://aicalculatorpro.com/alternatives/claude-sonnet-5/">Cheaper alternatives to Claude Sonnet 5 — AI Calculator Pro</a>