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OpenAI: GPT-5.6 Terra

openai/gpt-5.6-terra

text imageContext 1.1M

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...

Price

Input$2

per 1M tokens

Output$12

per 1M tokens

Compare this model

Providers

Each row is one seller. Prices are the published rate from that source. A dash means that source did not publish the amount. Sorted by a 3:1 blend of input and output.

ProviderTagQuant InputOutput ContextUptimeStatusSource
OpenAI openai/flex — $1/1M $6/1M 1.1M 100% Live openrouter-endpoints
AtlasCloud — fp8 $2/1M $12/1M 1.1M — Listed atlascloud
Azure azure — $2/1M $12/1M 1.1M 100% Live openrouter-endpoints
Inference.net — — $2/1M $12/1M 1.1M — Listed inferencenet
OpenAI openai — $2/1M $12/1M 1.1M 100% Live openrouter-endpoints
Phala — — $2/1M $12/1M 272K — Listed phala
Amazon Bedrock amazon-bedrock/us-east-1 — $2.2/1M $13.2/1M 1.1M — Live openrouter-endpoints
Azure azure/eu — $2.2/1M $13.2/1M 1.1M — Live openrouter-endpoints
Azure azure/us — $2.2/1M $13.2/1M 1.1M — Live openrouter-endpoints
OpenAI openai/fast — $4/1M $24/1M 1.1M — Live openrouter-endpoints
Replicate — — Not published— Not published— — — Listed replicate

Monthly bill

Token models use the token counts. Image, video, and audio models use units times the flat rate.

$14.00 at list price for this workload

Cache

Cache read$0.2

per 1M tokens

Cache write$2.5

per 1M tokens

Tiers

Web search
$0.01 per request
Above 272,000 prompt tokens
in $4 · out $18 · cache read $0.4 · cache write $5
Every rate
UnitInputOutputFlatConfidence
token $2/1M $12/1M Not published— official

Price history

OpenAI: GPT-5.6 Terra
15 0 2026-09-14: $22026-09-15: $22026-09-16: $22026-09-17: $22026-09-18: $22026-09-19: $22026-09-20: $22026-09-21: $22026-09-22: $22026-09-23: $22026-09-24: $22026-09-25: $22026-09-26: $22026-09-27: $22026-09-28: $22026-09-29: $22026-09-30: $22026-10-01: $22026-10-02: $22026-10-03: $22026-10-04: $22026-10-05: $22026-10-06: $22026-10-07: $22026-10-08: $22026-10-09: $22026-10-10: $22026-10-11: $22026-10-12: $22026-10-13: $22026-10-14: $22026-10-15: $22026-10-16: $22026-10-17: $22026-10-18: $22026-10-19: $22026-10-20: $22026-10-21: $22026-10-22: $22026-10-23: $22026-10-24: $22026-10-25: $22026-10-26: $22026-10-27: $22026-10-28: $22026-10-29: $22026-10-30: $2 2026-09-14 2026-10-30

input or flat output

Daily snapshots
UTC dateUnitInputOutputFlat
2026-09-14 token $2 $12 Not published—
2026-09-15 token $2 $12 Not published—
2026-09-16 token $2 $12 Not published—
2026-09-17 token $2 $12 Not published—
2026-09-18 token $2 $12 Not published—
2026-09-19 token $2 $12 Not published—
2026-09-20 token $2 $12 Not published—
2026-09-21 token $2 $12 Not published—
2026-09-22 token $2 $12 Not published—
2026-09-23 token $2 $12 Not published—
2026-09-24 token $2 $12 Not published—
2026-09-25 token $2 $12 Not published—
2026-09-26 token $2 $12 Not published—
2026-09-27 token $2 $12 Not published—
2026-09-28 token $2 $12 Not published—
2026-09-29 token $2 $12 Not published—
2026-09-30 token $2 $12 Not published—
2026-10-01 token $2 $12 Not published—
2026-10-02 token $2 $12 Not published—
2026-10-03 token $2 $12 Not published—
2026-10-04 token $2 $12 Not published—
2026-10-05 token $2 $12 Not published—
2026-10-06 token $2 $12 Not published—
2026-10-07 token $2 $12 Not published—
2026-10-08 token $2 $12 Not published—
2026-10-09 token $2 $12 Not published—
2026-10-10 token $2 $12 Not published—
2026-10-11 token $2 $12 Not published—
2026-10-12 token $2 $12 Not published—
2026-10-13 token $2 $12 Not published—
2026-10-14 token $2 $12 Not published—
2026-10-15 token $2 $12 Not published—
2026-10-16 token $2 $12 Not published—
2026-10-17 token $2 $12 Not published—
2026-10-18 token $2 $12 Not published—
2026-10-19 token $2 $12 Not published—
2026-10-20 token $2 $12 Not published—
2026-10-21 token $2 $12 Not published—
2026-10-22 token $2 $12 Not published—
2026-10-23 token $2 $12 Not published—
2026-10-24 token $2 $12 Not published—
2026-10-25 token $2 $12 Not published—
2026-10-26 token $2 $12 Not published—
2026-10-27 token $2 $12 Not published—
2026-10-28 token $2 $12 Not published—
2026-10-29 token $2 $12 Not published—
2026-10-30 token $2 $12 Not published—

Alternatives

Parameters (11)
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetoolsverbosity
Call this model

OpenRouter id openai/gpt-5.6-terra. InferenceList does not send the request.

curl 
curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-5.6-terra","messages":[{"role":"user","content":"Hello"}]}'

JavaScript 
await fetch("https://openrouter.ai/api/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: "Bearer " + process.env.OPENROUTER_API_KEY,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "openai/gpt-5.6-terra",
    messages: [{ role: "user", content: "Hello" }],
  }),
});

Python 
import os, json, urllib.request
req = urllib.request.Request(
    "https://openrouter.ai/api/v1/chat/completions",
    data=json.dumps({"model": "openai/gpt-5.6-terra", "messages": [{"role": "user", "content": "Hello"}]}).encode(),
    headers={"Authorization": "Bearer " + os.environ["OPENROUTER_API_KEY"], "Content-Type": "application/json"},
)
print(urllib.request.urlopen(req).read().decode())

JSON · History JSON