DeepSeek V4 Flash 0731 vs Claude Opus 5: price, context window and capabilities
DeepSeek V4 Flash 0731 (deepseek/deepseek-v4-flash-0731) is a language model from DeepSeek and Claude Opus 5 (anthropic/claude-opus-5) a multimodal language model from Anthropic; both are on the OceanToken API. DeepSeek V4 Flash 0731 costs less per token than Claude Opus 5: $0.21 against $4.50 per 1M input tokens (95% less) and $0.84 against $22.50 per 1M output tokens (96% less). Claude Opus 5 is 10% off its official price on OceanToken, for every account. DeepSeek V4 Flash 0731 has the larger context window: 1.05M tokens (1,048,576) against 1M (1,000,000) for Claude Opus 5. Both support tool calling, reasoning and structured outputs; only Claude Opus 5 also lists image input and file input.
Side by side
| Spec | DeepSeek V4 Flash 0731 −40% | Claude Opus 5 −10% |
|---|---|---|
| Model | DeepSeek V4 Flash 0731deepseek/ | Claude Opus 5anthropic/ |
| Publisher | DeepSeek | Anthropic |
| Kind | Text | Text & vision |
| Context window | 1.05M tokens1,048,576 | 1M tokens1,000,000 |
| Input price | $0.21 / 1M tokens | $4.50 / 1M tokens |
| Output price | $0.84 / 1M tokens | $22.50 / 1M tokens |
| Cached input price | $0.006 / 1M tokens | $0.50 / 1M tokens |
| Cache write price | – | $6.25 / 1M tokens |
| Web search price | – | $0.01 / search |
| Discount (vs official, top tier) | −40% | −10% |
| Inputs | text | 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 Flash 0731 to spend less per token: 95% less for input and 96% less for output than Claude Opus 5.
- Choose DeepSeek V4 Flash 0731 for the longest inputs: its context window holds 1.05M tokens against 1M for Claude Opus 5.
- Choose Claude Opus 5 if you need image input and file input: DeepSeek V4 Flash 0731 does not list them.
- 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 Flash 0731 Claude Opus 5
Frequently asked questions
Which is cheaper, DeepSeek V4 Flash 0731 or Claude Opus 5?
DeepSeek V4 Flash 0731. DeepSeek V4 Flash 0731 costs less per token than Claude Opus 5: $0.21 against $4.50 per 1M input tokens (95% less) and $0.84 against $22.50 per 1M output tokens (96% less). Claude Opus 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 Flash 0731 or Claude Opus 5?
DeepSeek V4 Flash 0731. DeepSeek V4 Flash 0731 has the larger context window: 1.05M tokens (1,048,576) against 1M (1,000,000) for Claude Opus 5.
Can I call both DeepSeek V4 Flash 0731 and Claude Opus 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-flash-0731 or anthropic/claude-opus-5.
Models and publishers
DeepSeek V4 Flash 0731 · Claude Opus 5 · All DeepSeek models · All Anthropic models
More comparisons
DeepSeek V4.1 Flash vs Claude Opus 5 · DeepSeek V4 Pro vs Claude Opus 5 · DeepSeek V4 Flash 0731 vs GPT-6 Sol · DeepSeek V4 Flash 0731 vs GPT-6.1 Sol · All comparisons