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DeepSeek V4.1-Flash-1017 Released: Major Gains in Development Capability, New Search API

Published: 2026-10-18 · Category: AI Model Updates
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Release Overview

On October 17, 2026, DeepSeek officially announced that the V4.1 Flash model had been updated to version V4.1-Flash-1017. The release went live simultaneously on the web app, the mobile app and the API, and the new model achieved significant gains across all benchmark tests.

Key Updates

  • Significantly stronger project development capability: the new model performs better at code generation, project analysis and complex task handling, and can complete development-related work more efficiently.
  • Lower cost: while maintaining high performance, inference costs were further optimized, giving users a more cost-effective option.
  • Faster responses: tasks are completed noticeably faster, making the user experience smoother.
  • Search and Fetch APIs opened for the first time: new web search and content fetching endpoints were added, both priced at ¥5 per thousand calls and now open to the public.
Important note: the new Search and Fetch endpoints give developers powerful capabilities for retrieving web information, which can be used to build intelligent search, content aggregation, data analysis and other applications.

API Pricing

Pricing for the new endpoints is as follows:

  • Search API: ¥5 per thousand calls
  • Fetch API: ¥5 per thousand calls

Pricing for the V4.1-Flash-1017 model itself remains unchanged, keeping the Flash series' strong price-performance advantage.

Upgrade Recommendations

All DeepSeek users are advised to upgrade to the latest version to experience these improvements:

  • Developers gain stronger code assistance and project analysis capabilities
  • Everyday users enjoy faster response times and lower costs
  • Developers can build more powerful AI applications with the new Search and Fetch APIs

Conclusion

The release of DeepSeek V4.1-Flash-1017 marks an important step forward for the series in terms of practicality and functionality. The new search APIs open up new possibilities for developers, while the model's own capability gains benefit all users. As a standard-bearer among China's domestic large models, DeepSeek keeps iterating rapidly and is closing the gap with the world's leading models.