meta
Xing4.0 29B A4B (free) vs Muse Spark Open
57.6 overall · $2.00 / 1M
// xingchen-agi
Xing4.0 29B A4B (free)
xingchen-agi/xing4.0-29b-a4b:free
Xing4.0 29B A4B (free) is free to call with a 262K-token context window.
A reasoning, tool-calling model from xingchen-agi, released Oct 16, 2026. LiveBench hasn't published a run for it, so this page carries measured price and specs only — no benchmark numbers.
- Input / 1M
- Free
- Output / 1M
- Free
- Context
- 262K
- LiveBench overall
- Not evaluated
Specs and pricing
| Input price USD per 1M prompt tokens | Free |
|---|---|
| Output price USD per 1M completion tokens, reasoning included | Free |
| Blended price 3:1 input:output — #1 cheapest of 352 listed models | Free |
| Cached input read Blank means not priced separately — not free | — |
| Cache write | — |
| Context window | 262,144 tokens |
| Max output | 235,929 tokens |
| Input modalities | text |
| Tool calling | Yes |
| Extended reasoning | Yes |
| Knowledge cutoff | — |
| Listed | Oct 16, 2026 |
What Xing4.0 29B A4B (free) costs to run
Monthly list cost across five workload shapes, using the published cached-input rate where there is one. A floor, not a quote — batch discounts and cache writes aren't included.
| Workload | Per month |
|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $0/mo |
| RAG assistant 8K in / 600 out × 100K requests | $0/mo |
| Coding agent 40K in / 4K out × 20K requests | $0/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $0/mo |
| Bulk classification 500 in / 20 out × 5M requests | $0/mo |
Compare Xing4.0 29B A4B (free) with
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Xing4.0 29B A4B (free) FAQ
How much does Xing4.0 29B A4B (free) cost?
Xing4.0 29B A4B (free) is listed as free on OpenRouter, typically with tighter rate limits than paid models.
What is the context window of Xing4.0 29B A4B (free)?
Xing4.0 29B A4B (free) accepts up to 262,144 tokens of context and can return up to 235,929 output tokens per response.
Does Xing4.0 29B A4B (free) support tool calling?
Yes — Xing4.0 29B A4B (free) supports tool (function) calling and exposes extended reasoning. It accepts text input.
How does Xing4.0 29B A4B (free) score on benchmarks?
LiveBench has not published a run for Xing4.0 29B A4B (free) yet. Until it does, compare it on price and specs, or run your own evaluation on your own tasks.
What is the API model ID for Xing4.0 29B A4B (free)?
On OpenRouter the model ID is "xingchen-agi/xing4.0-29b-a4b:free". It was listed on Oct 16, 2026.
How these numbers are produced
- Price and specs — provider list data from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores and ranks — LiveBench release 2026-09-02. Ranks count only models that have a published run; a blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.