MiniMax M3, DeepSeek V4, and GLM-5.3 can all drive coding agents, but their current capabilities differ. MiniMax M3 combines native multimodal input with a long context window. DeepSeek separates its V4 line into Flash, Pro, and an experimental Flash Vision model. GLM-5.3 is a text-only reasoning model aimed at complex software engineering.
Prices and plan limits change often, so this page avoids freezing a monthly total into the recommendation. Check the official pricing pages before buying credit or a plan.
At a glance
Three cheap agent models (verify current rates on official pages)
| MiniMax M3 | Native multimodal input, up to 1M context, metered API and token plans |
|---|---|
| DeepSeek V4 | Flash and Pro tiers plus an experimental Flash Vision model |
| GLM-5.3 | Text-only reasoning, 1M context, metered API and coding plans |
MiniMax M3
MiniMax M3 supports native text, image, and video input with up to a 1-million-token context window. MiniMax positions it for coding, tool use, and longer agent tasks. Setup: run MiniMax M3 with Claude Code.
DeepSeek V4
DeepSeek sells V4 Flash and V4 Pro by the token, with cached-input and peak or off-peak pricing. The experimental deepseek-v4-flash-vision-exp adds image understanding. DeepSeek also provides Anthropic and Responses-compatible endpoints for supported models. Setup: run DeepSeek V4 with Claude Code.
GLM-5.3
GLM-5.3 always uses reasoning and lets clients request low, high, or max effort. It accepts text only, has a 1-million-token context window, and supports Chat Completions, Responses, and Anthropic-compatible API routes. Setup: run GLM-5.3 with Claude Code.
How to choose
Start with the billing model and the tool connection you need:
- Metered access can suit occasional or uneven use because the charge follows API traffic.
- A coding plan can be easier to budget for frequent use, but check its request limits and rolling windows.
- MiniMax M3 fits tasks that combine code with screenshots, diagrams, video, or very long context.
- DeepSeek separates routine and harder work into Flash and Pro tiers.
A practical choice
Choose DeepSeek when its Flash and Pro split matches how you divide routine and difficult work. Choose MiniMax M3 when native multimodal input or very long context matters. Consider GLM-5.3 when you want its reasoning controls, Z.AI protocol options, or Coding Plan.
Run the same small repository task with each candidate before moving a production project. Record completion time, token use, failed tool calls, and how much correction the result needed. That test is more useful than a general benchmark ranking.
Pick your agent model
- Estimate your monthly usage and how bursty it is
- Compare current metered rates and coding-plan limits
- Check whether your tool can connect without a proxy
- Test the same repository task with each candidate
- Consider a router to mix models
Verify the setup
MiniMax M3, DeepSeek V4, and GLM-5.3 support coding-agent workflows through different modalities, model tiers, and billing options. Compare live prices, confirm tool compatibility, and test a representative task before deciding. A router can keep more than one provider available.
For the broader cost question, see cheapest AI coding API in 2026 and coding plans vs pay-per-token.
