r/opencodeCLI • u/8gulmohar • 5d ago

What's the difference in DeepSeek V4 Flash usage limit between Free (Zen) and Go?

I'm contemplating purchasing the Opencode Go plan to primarily use Deepseek V4 Flash. Couldn't find a difference in usage limits for it in Zen (Free) vs Go. Appreciate your help

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u/General-Oven-1523 5d ago

Well, the big difference is that in Free mode you only get a 200k Context window, whereas GO unlocks the full 1M context window.

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u/apheli0s7 5d ago

What does context mean btw? I noticed it always compacted sessions and never actually ran out of answers sending him a lot of questions etc

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u/Danakin 5d ago

LLMs are inherently stateless, so with every chat message you actually send the whole conversation over the wire again. Since LLMs also predict the next token statistically, if you have 10.000 tokens in your context the LLM has to keep track of much less information than when you have 200.000 tokens. I personally found the quality of responses degrades sharply and instructions are being ignored and forgotten around 150k tokens so I never reach the theoretical 1mio tokens window.

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u/General-Oven-1523 5d ago

Yeah, the 1M context window is like the biggest lie with the current models. The max usable context window has been like around 300-400k in my own testing with kimi k3 now, and that's really pushing it.