Models / Compare / GPT-6 Astra vs GPT-5.6 Sol

GPT-6 Astra vs GPT-5.6 Sol

Both models are available on RelayRouter through one base URL. This page shows which public groups serve each one, what the groups charge, and the protocol to call, so you can pick by price and integration effort. It does not rank quality.

GPT-6 Astra

gpt-6-astra

Provider: OpenAI
Modality: text generation
Public groups: 3
Cheapest group: GPT: settlement rate ¥0.6 per $1 of standard usage, about 91% below the ¥6.8/$ market reference
Protocols: OpenAI Chat Completions API

All groups

GPT: settlement rate ¥0.6 per $1 of standard usage, about 91% below the ¥6.8/$ market reference
Codex Fast: settlement rate ¥0.75 per $1 of standard usage, about 89% below the ¥6.8/$ market reference
OpenAI Stable: settlement rate ¥2.8 per $1 of standard usage, about 59% below the ¥6.8/$ market reference

GPT-5.6 Sol

gpt-5.6-sol

Provider: OpenAI
Modality: text generation
Public groups: 4
Cheapest group: GPT: settlement rate ¥0.6 per $1 of standard usage, about 91% below the ¥6.8/$ market reference
Protocols: OpenAI Chat Completions API

All groups

GPT: settlement rate ¥0.6 per $1 of standard usage, about 91% below the ¥6.8/$ market reference
Codex Fast: settlement rate ¥0.75 per $1 of standard usage, about 89% below the ¥6.8/$ market reference
GPT Azure: settlement rate ¥2.38 per $1 of standard usage, about 65% below the ¥6.8/$ market reference
OpenAI Stable: settlement rate ¥2.8 per $1 of standard usage, about 59% below the ¥6.8/$ market reference

Same request, two models

index.tstypescript

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.RELAYROUTER_API_KEY,
  baseURL: "https://relayrouter.io/v1",
});

const res = await client.chat.completions.create({
  model: "gpt-6-astra",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(res.choices[0].message.content);

index.tstypescript

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.RELAYROUTER_API_KEY,
  baseURL: "https://relayrouter.io/v1",
});

const res = await client.chat.completions.create({
  model: "gpt-5.6-sol",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(res.choices[0].message.content);

Questions

Is gpt-6-astra or gpt-5.6-sol cheaper on RelayRouter?

Compare the cheapest group of each: gpt-6-astra is served by "GPT" (settlement rate ¥0.6 per $1 of standard usage, about 91% below the ¥6.8/$ market reference) and gpt-5.6-sol by "GPT" (settlement rate ¥0.6 per $1 of standard usage, about 91% below the ¥6.8/$ market reference). Settlement rates apply to the provider's standard usage, so a model with a higher official price can still cost more at a lower rate.

Can I switch between the two without changing code?

If both models sit in groups with the same protocol you only change the model name. If the protocols differ, point the matching SDK at https://relayrouter.io; the base URL and key handling stay the same.

Does this page compare output quality?

No. It compares availability, protocols and price on RelayRouter. Run your own evaluation prompts through both models; failed requests are not billed.

Rates are indicative; the console shows the authoritative rate at request time. See pricing and the full model list.