Free Models Router vs XingChen: Xing4.0 29B A4B (free): Live Promos, Pricing, Hidden Fees & Latency
Free Models Router (openrouter/free) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Free Models Router: Activate ephemeral prefix caching to slash input costs by 50% (down to 0/1M) or route via asynchronous Batch API for 50% off standard token rates.
XingChen: Xing4.0 29B A4B (free) (xingchen-agi/xing4.0-29b-a4b:free) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for XingChen: Xing4.0 29B A4B (free): Activate ephemeral prefix caching to slash input costs by 50% (down to 0/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing Free Models Router (API ID: openrouter/free) vs XingChen: Xing4.0 29B A4B (free) (API ID: xingchen-agi/xing4.0-29b-a4b:free), Free Models Router offers lower standard input pricing at $0/1M tokens ($0/1M output), while Free Models Router leads in cached prefix economics at $0/1M tokens (50% discount). Free Models Router achieves a 0ms faster P90 time-to-first-token latency (280ms vs 280ms).
Auto-discovered via live global telemetry registry.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | Free Models Router | XingChen: Xing4.0 29B A4B (free) | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openrouter/free | xingchen-agi/xing4.0-29b-a4b:free | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0 / $0 | $0 / $0 | Free Models Router |
| Cache Read Price (per 1M) | $0/1M (50% Off) | $0/1M (50% Off) | Free Models Router |
| Context Window / Max Output | 195K In / 64K Out | 256K In / 230K Out | XingChen: Xing4.0 29B A4B (free) |
| P90 First-Token / Edge Latency | 280ms | 280ms | Free Models Router (-0ms) |
The simplest way to get free inference. openrouter/free is a router that selects free models at random from the models available on OpenRouter. The router smartly filters for model
Xing4.0-29B-A4B is an open-weight mixture-of-experts language model from China Telecom's AI team (TeleAI) and the successor to the TeleChat series. It has 29B total parameters with
Real-Time Stack Cost & Hidden-Fee Simulator (MAU / Token / Egress / GMV)
Calibrated with Reddit r/FinOps & r/devops telemetry: Includes Context Caching, Bandwidth Egress, and MoR Tax
🛰️Switch from Free Models Router to XingChen: Xing4.0 29B A4B (free)
Xing4.0-29B-A4B is an open-weight mixture-of-experts language model from China Telecom's AI team (TeleAI) and the successor to the TeleChat series. It has 29B total parameters with Verified P90 latency of 280ms.