AI Weekly Malaysia

Simon Willison notes that DeepSeek V4 Pro 0813 is now available via API on OpenRouter, with no official announcement page from DeepSeek. Open weights are likely but unconfirmed, given prior releases of DeepSeek-V4-Pro (April) and DeepSeek-V4-Flash-0731 (July). Willison observed visibly different outputs across the model's low, medium, and high reasoning levels, and benchmark numbers circulated only through a WeChat group, a deleted Reddit post, and an ASCII-art Hacker News table.

Why: If you're already routing through OpenRouter, you can test V4 Pro 0813 today and compare its three reasoning levels against your current model picks—but there are no confirmed open weights, no official benchmarks, and no pricing detail in this post, so there's nothing actionable here for builders not already evaluating DeepSeek.

DeepSeek V4 Pro 0813 is now generally available on OpenRouter as a large-scale mixture-of-experts model. It features a 1 million token context window and costs $0.435 per 1M input tokens and $0.87 per 1M output tokens.

Why: Builders can swap their OpenAI-compatible base URL to test DeepSeek V4 Pro's 1M context window at roughly $0.43/$0.87 per 1M tokens, evaluating if it fits long-context agent workloads at a lower cost than current alternatives.