DeepSeek V4 Pro 0813 Available on OpenRouter

The new artificial intelligence model DeepSeek V4 Pro 0813 is now available exclusively through the OpenRouter API. Because DeepSeek did not publish an official announcement page for the release, details emerged from alternative sources. It remains unconfirmed whether DeepSeek will release the open weights for this specific version, though prior models from April and July made their weights available.

When testing the model using a specific prompt involving pelicans, the author observed distinct visual outputs across the low, medium, and high reasoning levels. This level of variation between reasoning tiers was noted as unusual compared to other artificial intelligence models.

Information regarding the model performance benchmarks did not come from an official company press release. Instead, the benchmark data originated in an official DeepSeek WeChat group, migrated to Reddit before being removed by moderators, and finally appeared in an ASCII-art table on Hacker News.