Claude-Sonnet-3.5: API pricing, providers and specs
Claude-Sonnet-3.5 is a text model by Anthropic. One provider serves it: Helicone, at $15 /1M.
A newer version is out: Claude-Sonnet-3.7
Lowest price$15/1Mat Helicone
Maker's price—The maker does not sell it
Providers1
Context—
How Claude-Sonnet-3.5 compares
Against the 737 text models on the site priced the same way.
- Pricey for its class: at $15 /1M, its lowest price is above 91% of comparable models (median $1.10).
- On LMArena's Text board it ranks #82 of the 120 comparable models scored there.
- 1 providers serve it; 0% of comparable models have fewer.
Claude-Sonnet-3.5 prices by provider
Every provider's list price, read from its own price page or API. A price marked “from” changes with context length, resolution or mode.
| Provider | Input | Output | Prompt caching | Context |
|---|---|---|---|---|
 Helicone | $3/1M | From$15/1M | $0.30/1M | — |
Prices in US dollars, updated daily from each provider. Prices last checked Oct 25, 2026.
Specs
- Type
- Text
- Maker
- Anthropic
- Inputs
- Text
- Outputs
- Text
- Context
- —
- Max output
- —
- Capabilities
- —
- Released
- —
- License
- proprietary
- Open weights
- No, API only
- Arena score
- 1298Text
- Monthly searches
- 47K
Alternatives to Claude-Sonnet-3.5
Same kind of model from other makers, at a similar price.
| Model | Lowest price | Context | Arena | Providers |
|---|---|---|---|---|
| Claude-Sonnet-3.5this model | $15/1M | — | 1298 | 1 |
 Gemini 4 Argon | $8/1M | 1.05M | 1673 | 26 |
| Kimi K3 | $8.28/1M | 1.05M | 1655 | 47 |
| GPT-6 Astra | $25/1M | 1.05M | 1775 | 31 |
 Muse Wonder | $16/1M | 1.05M | — | 14 |
| GPT-6.1 Sol | $8/1M | 1.05M | 1749 | 27 |
| GPT-6 Sol | $8/1M | 1.05M | 1682 | 28 |
| GPT-5 | $8/1M | 400K | 1418 | 26 |
| GPT-5.6 | $10/1M | 1.05M | 1615 | 29 |
More from Anthropic
Claude Opus 5.5Anthropic$16/1MClaude Sonnet 5.5Anthropic$8/1MClaude Haiku 5.5Anthropic$0.30/1MClaude Opus 5Anthropic$20/1MClaude Sonnet 4.6Anthropic$12/1MClaude Fable 5Anthropic$40/1MClaude Fable 5.1Anthropic$40/1MClaude Sonnet 5Anthropic$6.90/1M
All 35 Anthropic modelsClaude-Sonnet-3.5 FAQ
The lowest price for Claude-Sonnet-3.5 is $15 /1M, at Helicone.
No. Claude-Sonnet-3.5 is only available through an API; Anthropic does not publish its weights.
1 API providers serve Claude-Sonnet-3.5. Compare their prices above, or open a provider to see everything it offers.
Can't find what you're looking for? Contact us