DeepSeek V4.1 Flash
Tops our lineup on DeepSWE, matches GLM 5.3 on the Intelligence Index, runs fast, and reads images. The model still has two rare quirks: a long run can loop, or a tool call can fail. If that happens, restart the run or switch to DeepSeek V4 Flash, which doesn't do this.
- Price per 1M tokens
- $0.15 in$0.60 out
- $0.028 cache read
- Context
- 1M
- 384K max output
- Vision
- Tool calling
- Reasoning optional, default high
How it ranks
Against every model we serve, best first. Starred scores are reported by the publisher on its model card; the rest are independent measurements. About the scores
- DeepSeek V4.1 Flash45
- GLM 5.345
- Kimi K344
- GLM 5.3 Flash42
- DeepSeek V4 Flash34
- Qwen3.6 35B A3B18
- DeepSeek V4.1 Flash77%* reported by the publisher
- GLM 5.369%
- Kimi K368.5%
- GLM 5.3 Flash63.4%
- DeepSeek V4 Flash54.4%* reported by the publisher
Not published: Qwen3.6 35B A3B.
- DeepSeek V4.1 Flash90.6%* reported by the publisher† measured before the 1017 update
- Kimi K385%
- GLM 5.3 Flash84.3%
- GLM 5.383.9%
- DeepSeek V4 Flash78.7%
- Qwen3.6 35B A3B44.9%
† DeepSeek V4.1 Flash: measured on its previous weights, before the 1017 update. No 2.1 score yet for 1017; on Terminal-Bench 4.0 the update took it from 26.8% to 33.8% (Artificial Analysis).
Pricing
- Input
- $0.15 per 1M tokens
- Output
- $0.60 per 1M tokens
- Cache read
- $0.028 per 1M tokens
Specs
- Context window
- 1M tokens
- Max output
- 384K tokens
- Vision
- Yes
- Tool calling
- Yes
- Reasoning
- Adjustable (none, low, high, max)
- Default effort
- high
- Weights
- FP8 on Hugging Face
- In production since
- September 18, 2026
Quickstart
Pick your tool; the command already carries this model's id. More tools (Pi, Copilot, Zed, omp) in the setup guides.
curl -fsSL https://api.code.umans.ai/cli/install.sh | bash # once
umans opencode --model umans-deepseek-v4.1-flash
