DeepSeek V4.1 Flash (1017) vs Claude Sonnet 5: price, context window and capabilities
DeepSeek V4.1 Flash (1017, deepseek/deepseek-v4.1-flash-1017) from DeepSeek and Claude Sonnet 5 (anthropic/claude-sonnet-5) from Anthropic are both multimodal language models on the OceanToken API. DeepSeek V4.1 Flash costs less per token than Claude Sonnet 5: $0.21 against $1.80 per 1M input tokens (88% less) and $0.84 against $9.00 per 1M output tokens (91% less). Claude Sonnet 5 is 10% off its official price on OceanToken, for every account. DeepSeek V4.1 Flash has the larger context window: 1.05M tokens (1,048,576) against 1M (1,000,000) for Claude Sonnet 5. Both support tool calling, reasoning, structured outputs and image input; only Claude Sonnet 5 also lists file input.
Side by side
| Spec | DeepSeek V4.1 Flash −40% | Claude Sonnet 5 −10% |
|---|---|---|
| Model | DeepSeek V4.1 Flash (1017)deepseek/ | Claude Sonnet 5anthropic/ |
| Publisher | DeepSeek | Anthropic |
| Kind | Text & vision | Text & vision |
| Context window | 1.05M tokens1,048,576 | 1M tokens1,000,000 |
| Input price | $0.21 / 1M tokens | $1.80 / 1M tokens |
| Output price | $0.84 / 1M tokens | $9.00 / 1M tokens |
| Cached input price | $0.006 / 1M tokens | $0.20 / 1M tokens |
| Cache write price | – | $2.50 / 1M tokens |
| Web search price | – | $0.01 / search |
| Discount (vs official, top tier) | −40% | −10% |
| Inputs | text and images | text, images and files |
| Outputs | text | text |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Yes |
About these prices
Which should you choose?
- Choose DeepSeek V4.1 Flash to spend less per token: 88% less for input and 91% less for output than Claude Sonnet 5.
- Choose DeepSeek V4.1 Flash for the longest inputs: its context window holds 1.05M tokens against 1M for Claude Sonnet 5.
- Choose Claude Sonnet 5 if you need file input: DeepSeek V4.1 Flash does not list it.
- Not sure? Call both with the same OceanToken API key and compare them on your own prompts; each request is billed per use from one prepaid balance.
Get API Key DeepSeek V4.1 Flash Claude Sonnet 5
Frequently asked questions
Which is cheaper, DeepSeek V4.1 Flash or Claude Sonnet 5?
DeepSeek V4.1 Flash. DeepSeek V4.1 Flash costs less per token than Claude Sonnet 5: $0.21 against $1.80 per 1M input tokens (88% less) and $0.84 against $9.00 per 1M output tokens (91% less). Claude Sonnet 5 is 10% off its official price on OceanToken, for every account. The OceanToken console always shows the current price.
Which has the larger context window, DeepSeek V4.1 Flash or Claude Sonnet 5?
DeepSeek V4.1 Flash. DeepSeek V4.1 Flash has the larger context window: 1.05M tokens (1,048,576) against 1M (1,000,000) for Claude Sonnet 5.
Can I call both DeepSeek V4.1 Flash and Claude Sonnet 5 with one API key?
Yes. Both are on the OceanToken API at https://api.oceantoken.ai/v1: one API key and one prepaid balance call either model. Send the model id deepseek/deepseek-v4.1-flash-1017 or anthropic/claude-sonnet-5.
Models and publishers
DeepSeek V4.1 Flash · Claude Sonnet 5 · All DeepSeek models · All Anthropic models
More comparisons
DeepSeek V4.1 Flash vs Claude Opus 5.5 · DeepSeek V4.1 Flash vs Claude Fable 5.1 · DeepSeek V4.1 Flash vs Claude Opus 5 · DeepSeek V4.1 Flash vs GPT-6 Sol · All comparisons