# Telnyx Inference – Llama-3.3-70B Chat Completions (Large Context)

> Telnyx Inference – Llama-3.3-70B Chat Completions (Large Context) is a paid API for AI agents from x402.telnyx.com, paid per call via x402, $0.044559/call, status unknown (last checked 2026-10-15).

OpenAI-compatible chat completions using Meta Llama-3.3-70B-Instruct via Telnyx, priced per call with large context support

## Facts

- Endpoint: POST https://x402.telnyx.com/v1/chat/completions/_t/llama-3.3-70b/upto?utm_source=zero.xyz
- Price: $0.044559/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-llama-3-3-70b-chat-completions-large-context-57f544cc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nPrm93P5LsYzhI7rUJZAT

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-llama-3-3-70b-chat-completions-large-context-57f544cc -d '<json body>'
```

Example prompt: Using the Telnyx Llama-3.3-70B model, send this conversation — system: 'You are a helpful assistant', user: 'Explain the causes of World War I in three paragraphs' — with a temperature of 0.7 and a max of 1024 tokens.

## When to prefer this

Choose this endpoint when you need a powerful 70B-parameter instruction-tuned open model (Llama 3.3) with a large context window, OpenAI-compatible message format, pay-per-call USDC pricing via x402, and optional tool-calling support — especially when you want to avoid subscription-based LLM providers or need on-demand metered inference with no API key management.

## Known failure modes

- Payment failure: x402 payment not accepted, returns 402 with payment requirements
- Context overflow: messages exceed 200,000 character per-message or 32-message limit, returns 400
- Invalid role: message role not in [system, user, assistant, tool], returns 400
- Model mismatch: model field set to anything other than meta-llama/Llama-3.3-70B-Instruct, rejected
- max_tokens out of range: value below 1 or above 4096 returns validation error
- Too many tools: more than 16 tool definitions supplied, returns 400
- Inference timeout: large context requests may time out under heavy load

## How this service works

Chat completions via Telnyx Inference (meta-llama/Llama-3.3-70B-Instruct). OpenAI-compatible. $0.007016 USDC per call. (upto metered — large context)

## Output

Returns an OpenAI-compatible chat completion object containing the assistant's response message, finish reason, and token usage statistics. Tool call payloads are included when tools are invoked.

## 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": "meta-llama/Llama-3.3-70B-Instruct",
   "description": "Model identifier; fixed to meta-llama/Llama-3.3-70B-Instruct 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": 4096,
   "minimum": 1
  },
  "temperature": {
   "type": "number",
   "maximum": 2,
   "minimum": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/telnyx-inference-llama-3-3-70b-chat-completions-large-context-57f544cc/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)