NexKit AI · Compare
DeepSeek vs Qwen for coding
Both run Codex and Claude Code through NexKit, on your own key, for nothing extra. What differs is not quality — it is where the key comes from, whether your region matters, and how each one behaves in a tool loop.
NexKit publishes no benchmark, and this page is not one.
Putting it at the top rather than the bottom, because a comparison page that buries this has already misled the person who only read the table.
NexKit has not measured latency, throughput, cost per task or answer quality for any model on either provider. No number of that kind appears anywhere on this site. Anyone publishing a coding-quality ranking of these two is reporting their own workload, not yours — and the whole reason this product exists is that switching between them costs you one model id, so you can settle it on your own codebase in an afternoon.
What follows is the set of differences that are facts about the integration rather than opinions about the models. Those are the ones that actually cost people a day.
What actually differs.
Every row is either a property of the provider's own signup and endpoints, or a limitation verified against the live API one axis at a time.
| DeepSeek | Alibaba Model Studio (Qwen) | |
|---|---|---|
| Where the key comes from | The DeepSeek platform console. One account, one key, no region to pick. | The Alibaba Cloud Model Studio (Bailian) console — which is a full cloud account rather than a standalone API signup. |
| Regions | One endpoint. A key works wherever you are. | Regions are separate accounts. The international and Beijing endpoints are distinct, and a key issued for one is rejected by the other. This is the single most common reason a correct-looking Qwen setup returns 401. |
| Ids in the NexKit catalogue | 2 — deepseek-v4-flash, deepseek-v4-pro | 4, including qwen3-coder-next, a coding-specialised line. Alibaba now points most work at the general-purpose models. |
| Track record of id churn | deepseek-chat and deepseek-reasoner were disabled upstream on 2026-07-24. NexKit keeps them as retired rows so naming one gets a 404 that says what to use instead, rather than a silent failure. | No id in this catalogue has been retired since NexKit added the provider. |
| Thinking mode with forced tool calls | Refuses a forced tool_choice while thinking is on. NexKit disables thinking for exactly that request, using DeepSeek’s own thinking field. | Refuses the same combination, and Qwen 3.7/3.8 think by default. NexKit sets Alibaba’s own enable_thinking: false for exactly that request — a different field, because the cure is not shared. |
| Thinking mode in a Claude Code tool loop | Thinking is off for the whole loop. DeepSeek requires its reasoning scratchpad to be replayed on every following turn, and the Anthropic Messages shape has no block that can carry it. NexKit disables thinking from the first tool-capable turn rather than storing your content or improvising a block. | Thinking stays on unless a tool call is forced. Nothing has established that Model Studio demands the same replay, so NexKit does not assume it. |
| Works with Codex | Yes — run end to end against a real Codex. | Yes — run end to end against a real Codex. |
| Works with Claude Code | Yes — run end to end against a real Claude Code. | Yes — run end to end against a real Claude Code. |
| Who bills you | DeepSeek, directly, on your own account. | Alibaba Cloud, directly, on your own account. |
| What NexKit charges | Nothing. | Nothing. |
A shorter answer.
If you want a recommendation rather than a table, these are the only two that follow from facts rather than from taste.
Start with DeepSeek if
You want the shortest path to a working key. One console, one endpoint, no region to get wrong, and it is the default in every config block on this site.
Start with Qwen if
You already have an Alibaba Cloud account, you want a coding-specialised id to try (qwen3-coder-next), or you want thinking mode left on through a Claude Code tool loop.
You do not have to choose. Attach both credentials to the same account and the 6 ids sit in one catalogue behind one key. Switching an agent from one provider to the other is then a single model id, with nothing else in the configuration touched.
Settle it on your own codebase.
Attach both, point your agent at one, change one line, point it at the other. That comparison is worth more than any table, including this one.