DeepSeek V4.5
DeepSeek's July 5 2026 open-weight release under an MIT license — the strongest open reasoning model on price-per-quality. SWE-bench Pro 62.1%, GPQA Diamond 91.8%, and competition-math scores that sit with the proprietary frontier. Hosted API pricing is $0.50/$1.10 per 1M tokens; weights are downloadable for on-prem or private-cloud inference, so the marginal token cost self-hosted is infrastructure only. Benchmarks were self-reported at launch; the technical report and full eval harness followed within a week.
256K
tokens
33K
tokens
$0.5
per 1M tokens
$1.1
per 1M tokens
62
tokens/sec
Jul 2026
2026-07-05
$0.80
per 1M tokens
115.0
quality per $
Capabilities
Benchmarks
Compare With
Open Source — Licensed under MIT
About DeepSeek V4.5
DeepSeek V4.5 is a reasoning AI model by DeepSeek, released on July 5, 2026. It supports a context window of 256K tokens and can generate up to 33K output tokens.
At $0.5 per million input tokens and $1.1 per million output tokens, its blended cost of $0.80/1M tokens makes it one of the most affordable models available. Its value score of 115.0 reflects the balance of quality and cost.
DeepSeek V4.5 is available as an open-source model under the MIT license, meaning you can self-host it for predictable costs or use it through API providers like Swfte Connect.
Using DeepSeek V4.5 with Swfte
Access DeepSeek V4.5 through Swfte Connect, our unified LLM gateway. Connect gives you a single API for 50+ models, with automatic routing, cost optimization, and fallback handling. You can also try DeepSeek V4.5 in our AI Playground before integrating.