Catalog
DeepSeek
DeepSeek V4 Flash
deepseek-v4-flash-0731
52Index
MITGenerally available1M context1.6TText
Pick this when
High-volume open-weight work. The sensible DeepSeek default.
Skip when
The task needs Pro headroom, or you need vision.
Flash first, Pro when a job fails. That ladder is the product.
Price
- Input / 1M
- $0.44
- Output / 1M
- $1.32
- Measured task
- $0.11
Default DeepSeek for volume. Same MIT weights story.
Shape
- Context
- 1M
- Max output
- 64K
- Released
- 2026-07-31
- Tools
- Yes
- Reasoning
- Yes
Scores
Intelligence index52
GPQA Diamond83
Terminal-Bench 2.170
Agentic index38
- Arena
- —
- Speed
- 130/s
- GPQA
- 82.7%
- Term.
- 70.1%
- AA Index. The single number most people mean by “how smart.” It is a blend, so a specialist can lose here and still win the job you care about.
- GPQA. A clean test of hard reasoning. PhD experts sit around 65%. It says little about writing, tools, or taste.
- Term.. Closest public proxy for coding agents that live in a terminal. A high index score with a weak terminal score is a warning.
- Arena. Captures taste and usefulness that unit tests miss. Sample size varies by model, so treat gaps under ~100 Elo as noise.
DeepSeek · Hangzhou. Open weights under MIT. V4 Pro is the first downloadable model that actually sits in the frontier cluster. Flash is the volume lane.