DeepSeek released V4-Pro on the same day as GPT-5.5, with an unusual combination: the model weights are available under Apache 2.0, an open license, but the most cost-effective way to run it — the API tier — is a commercial service priced like a startup, not a research project. V4-Pro charges $3.48 per million output tokens, compared to $30 for GPT-5.5 and $25 for Claude Opus 4.7. For teams deploying coding agents at scale, that is a meaningful dollar difference.
The agent ecosystem has already integrated V4 at the API level. It is available at launch through Claude Code, OpenClaw, and OpenCode, the frameworks developers use to chain model calls into automated pipelines. The OpenClaw integration requires manual configuration — V4 is not in the default model routing list, which means teams cannot point an existing OpenClaw setup at V4 without explicit setup. OpenClaw did not respond to a request for comment on whether that will change.
V4-Pro activates 49 billion of its 1.6 trillion total parameters per token, keeping inference compute low, according to DeepSeek's technical documentation. The KV cache — the working memory the model holds during a long context window — is 10 percent of the prior version's size at 1 million tokens of context, and single-token inference requires 27 percent of the compute V3.2 needed, according to ofox.ai. Those figures are DeepSeek's own.
On SWE-Verified, a benchmark of real software engineering tasks, V4-Pro scores 80.6 — essentially tying Claude Opus 4.6 at 80.8 on the same test, according to Office Chai. Opus 4.6 is the relevant comparison point; Opus 4.7 scores 87.6 on the same benchmark. On Codeforces, a competitive programming platform, V4-Pro rates 3206, ahead of GPT-5.4 xHigh at 3168, according to ofox.ai. All benchmark figures are DeepSeek's own and have not been independently verified in production.
This is the fifth "GPT killer" announcement this week, and benchmark performance at launch has historically been more flattering than production results. The price gap, though, is new, and it is large. What to watch is whether OpenClaw and Claude Code add V4 to their default routing, which would remove the manual setup step and likely drive adoption among cost-sensitive teams. Whether DeepSeek's API supply can meet that demand if they do is not yet publicly documented.