Top Billing
Chat & reasoning

tb-gpt-6-1-sol

GPT-6.1 Sol

AvailableRoute checked 25 Oct 2026, 1:33 am IST

Technical specifications

Model ID
tb-gpt-6-1-sol
Made by
OpenAI
Input price
₹172.80 per 1M tokens
Output price
₹864 per 1M tokens
Cache read
₹17.28 per 1M tokens
Cache write
₹172.80 per 1M tokens
Context window
1,000,000 tokens
Max output
128,000 tokens
Input
Text
Output
Text, Tool calls
Streaming
Yes — server-sent events
Anthropic lane
Translated — see the Claude Code guide for recommended flags

Capabilities

  • chatsupported
  • streamingsupported
  • toolssupported
  • visionnot supported
  • reasoningnot supported
  • structured outputnot supported
  • prompt cachingnot supported
  • token countingnot supported

Only capabilities that passed conformance checks on this model’s routes are listed as supported. Asking for anything else returns 400 capability_not_supported and reserves nothing.

Supported APIs

  • POSThttps://api.topbilling.in/v1/chat/completionsChat Completions (OpenAI-compatible)
  • POSThttps://api.topbilling.in/v1/messagesMessages (Anthropic-compatible, translated lane)
  • GEThttps://api.topbilling.in/v1/models/tb-gpt-6-1-solModel metadata

Usage example

POST /v1/chat/completions
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["TB_API_KEY"],
    base_url="https://api.topbilling.in/v1",
)

response = client.chat.completions.create(
    model="tb-gpt-6-1-sol",
    messages=[{"role": "user", "content": "Summarise this ticket in one line."}],
)
print(response.choices[0].message.content)

The same model on the Anthropic-compatible endpoint:

POST /v1/messages
curl https://api.topbilling.in/v1/messages \
  -H "x-api-key: $TB_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{"model": "tb-gpt-6-1-sol", "max_tokens": 256, "messages": [{"role": "user", "content": "Hello"}]}'
tb-gpt-6-1-sol · Models · Top Billing