GPT-5.6 Terra (Reseller)

GPT-5.6 Terra via third-party reseller channels (Responses API, 272K tiered billing).

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Input price: $1.00–$2.00
Output price: $6.00–$9.00

Context: 1.1M
Max output: 128K

Capability: 161 (#16 of 79)
Human preference: 1449
30-day uptime: —

Released: 2026-07-09

InputTextImageOutputText

Providers

Providers that serve this model. With Auto, each request goes to the best available provider. Prices in USD per 1M tokens; stats cover the last 30 days.

AutoInput$1.00–$2.00Output$6.00–$9.00Cache read—Context1.1MMax output128KWe send each request to the best-priced healthy provider. You pay that provider’s price.Reseller (managed pool)Input$1.00–$2.00Output$6.00–$9.00Cache read—ChinaNo training

Pricing

All prices for this model, by service tier.

Input: $1.00; per 1M tokens
Output: $6.00; per 1M tokens
Cache write (5 min): $1.25; per 1M tokens

Prompt > 272K tokens

Input: $2.00; per 1M tokens
Output: $9.00; per 1M tokens
Cache write (5 min): $2.50; per 1M tokens

Try it

Runs on your balance and is billed like any API request.

curl https://api.ohmygpt.com/v1/responses \
  -H "Authorization: Bearer $OHMYGPT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "codex/gpt-5.6-terra",
    "input": "Hello"
  }'

import os

from openai import OpenAI

client = OpenAI(
    api_key=os.environ["OHMYGPT_API_KEY"],
    base_url="https://api.ohmygpt.com/v1",
)

response = client.responses.create(
    model="codex/gpt-5.6-terra",
    input="Hello",
)
print(response.output_text)

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.OHMYGPT_API_KEY,
  baseURL: "https://api.ohmygpt.com/v1",
});

const response = await client.responses.create({
  model: "codex/gpt-5.6-terra",
  input: "Hello",
});
console.log(response.output_text);

# ~/.codex/config.toml
model = "codex/gpt-5.6-terra"
model_provider = "ohmygpt"

[model_providers.ohmygpt]
name = "OhMyGPT"
base_url = "https://api.ohmygpt.com/v1"
env_key = "OHMYGPT_API_KEY"
wire_api = "responses"

The answer streams in here.

Billed by usage

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Better value: more capable, lower price
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Capability scores are from Epoch AI’s Epoch Capabilities Index (CC BY 4.0, as of 2026-11-10), which combines dozens of benchmarks with GPT-5 set at 150. epoch.ai/eci

Price: our current input price per 1M tokens in USD, lowest across channels. Dated snapshots and resold copies of the same model are merged into one point; free models are not shown.

Shaded area: capability above and price below the median of all models. Pareto frontier: no other model is both cheaper and more capable.

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Capability: 161
Input: $1.00–$2.00
Output: $6.00–$9.00

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Human preference ratings are from the LMArena Text Arena (CC BY 4.0, as of 2026-11-09): Elo ratings from blind votes, on a different scale from capability scores. lmarena.ai/leaderboard/text