# Telnyx Inference – Kimi-K2.5 Chat Completions (Large Context, Metered)

> Telnyx Inference – Kimi-K2.5 Chat Completions (Large Context, Metered) is a paid API for AI agents from x402.telnyx.com, paid per call via x402, $0.066677/call, status unknown (last checked 2026-10-15).

Runs OpenAI-compatible chat completions using Moonshot AI's Kimi-K2.5 model via Telnyx Inference, billed per call for large/metered context usage

## Facts

- Endpoint: POST https://x402.telnyx.com/v1/chat/completions/_t/kimi-k2.5/upto?utm_source=zero.xyz
- Price: $0.066677/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/telnyx-inference-kimi-k2-5-chat-completions-large-context-metered-568d4a74
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Qtnq6rXYT-lT4EKsYk9-Y

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability telnyx-inference-kimi-k2-5-chat-completions-large-context-metered-568d4a74 -d '<json body>'
```

Example prompt: Using the Kimi-K2.5 model on Telnyx Inference, send this conversation to the model — system: 'You are a helpful research assistant', user: 'Summarize the key differences between transformer and mamba architectures' — keep the reply under 800 tokens and temperature at 0.7.

## When to prefer this

Choose this endpoint when you need Moonshot AI's Kimi-K2.5 model specifically — known for strong long-context reasoning — and want a pay-per-call model with no subscription or API key management via Telnyx's x402 micropayment system. Prefer it over cheaper Telnyx sibling models (DeepSeek, Gemma) when the task requires extended context windows or Kimi-K2.5's particular reasoning style. The 'upto' (metered/large context) route is best for prompts that may grow large, as opposed to a fixed small-context route.

## Known failure modes

- Payment failure (x402): insufficient USDC balance or wallet not configured, returns 402 Payment Required
- Content too long: messages array exceeds 200,000 chars per message or 32-message limit, returns 400
- Invalid model value: any model string other than 'moonshotai/Kimi-K2.5' will be rejected
- max_tokens out of range: values above 8192 or below 1 return validation error
- Temperature out of range: values outside 0–2 return 400 Bad Request
- Tools array exceeds 16 items: returns validation error
- Rate limiting or upstream inference timeout from Telnyx backend: 503 or 504

## How this service works

Chat completions via Telnyx Inference (moonshotai/Kimi-K2.5). OpenAI-compatible. $0.016673 USDC per call. (upto metered — large context)

## Output

Returns an OpenAI-compatible chat completion object containing the assistant's generated message, finish reason, token usage counts, and any tool call invocations if tools were provided. The model field in the response confirms moonshotai/Kimi-K2.5 was used.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "n": {
   "type": "integer",
   "const": 1,
   "description": "Fixed to one completion per paid call."
  },
  "model": {
   "type": "string",
   "const": "moonshotai/Kimi-K2.5",
   "description": "Model identifier; fixed to moonshotai/Kimi-K2.5 on this route."
  },
  "tools": {
   "type": "array",
   "items": {
    "type": "object"
   },
   "maxItems": 16
  },
  "messages": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "role",
     "content"
    ],
    "properties": {
     "role": {
      "enum": [
       "system",
       "user",
       "assistant",
       "tool"
      ],
      "type": "string"
     },
     "content": {
      "type": "string",
      "maxLength": 200000
     }
    }
   },
   "maxItems": 32,
   "description": "OpenAI-style chat messages."
  },
  "max_tokens": {
   "type": "integer",
   "maximum": 8192,
   "minimum": 1
  },
  "temperature": {
   "type": "number",
   "maximum": 2,
   "minimum": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/telnyx-inference-kimi-k2-5-chat-completions-large-context-metered-568d4a74/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.telnyx.com](https://www.zero.xyz/host/x402.telnyx.com/llms.txt)