GPT-6 Sol API — pricing & specs

GPT-6 Sol accepts text and image input and supports selectable reasoning effort, including a non-thinking mode. On KeepRouter, GPT-6 Sol costs $5.00 per 1M input tokens and $15.00 per 1M output tokens, billed pay-as-you-go with no monthly fee. Call it through a compatible KeepRouter endpoint supported by its active route, with the model id gpt-6-sol.

MakerOpenAI
ModalityText, vision
Context window1,050,000 tokens
Max output128,000 tokens
Knowledge cutoff2026-04-20
Input price$5.00 per 1M tokens
Output price$15.00 per 1M tokens
Cached input$0.4000 per 1M tokens
CapabilitiesVision (image input), Chat completions, Streaming where supported, Tool calling where supported
EndpointPOST /v1/chat/completions or POST /v1/responses
Model idgpt-6-sol

How pricing works for GPT-6 Sol

GPT-6 Sol is billed per token — $5.00 per 1M input tokens and $15.00 per 1M output tokens, with cached input at $0.4000 per 1M tokens. The published price is pay-as-you-go, with no monthly fee; actual request cost depends on measured token usage.

Calling GPT-6 Sol on KeepRouter

Point a compatible client at the supported KeepRouter endpoint and set the model to gpt-6-sol. KeepRouter preserves the client-facing request shape while handling upstream routing or translation. Use POST /v1/chat/completions or, on compatible chat routes, POST /v1/messages; streaming and tool support depend on the model's active route.

cURL

curl https://keeprouter.com/v1/responses \
  -H "Authorization: Bearer $KEEPROUTER_KEY" -H "Content-Type: application/json" \
  -d '{"model":"gpt-6-sol","input":"Reply with one short greeting.","reasoning":{"effort":"low"},"max_output_tokens":1024,"store":false}'

Python

import os
from openai import OpenAI
client = OpenAI(base_url="https://keeprouter.com/v1", api_key=os.environ["KEEPROUTER_KEY"], max_retries=0)
r = client.responses.create(model="gpt-6-sol", input="Reply with one short greeting.", reasoning={"effort": "low"}, max_output_tokens=1024, store=False)

JavaScript

const res = await fetch("https://keeprouter.com/v1/responses", {
  method: "POST",
  headers: { Authorization: "Bearer " + process.env.KEEPROUTER_KEY, "Content-Type": "application/json" },
  body: JSON.stringify({"model":"gpt-6-sol","input":"Reply with one short greeting.","reasoning":{"effort":"low"},"max_output_tokens":1024,"store":false}),
});

Estimate API costs

At the current KeepRouter customer price, an example workload of 1,000 total input tokens, no cached input, and 500 output tokens per request costs approximately $0.0125 per request. At 100 requests per day, that is $37.50 over 30 days. This is a usage estimate, excluding processing fees, taxes, retries and application infrastructure. Actual usage, cache hits and supported generation durations need their own checks.

Adjust quantities in the API cost calculator.

Model identity and official sources

Sources checked 2026-10-03.

Bounded generation checked

On October 3, 2026, this exact ID returned HTTP 200, visible text and final token usage through /v1/responses. These small checks do not establish task accuracy, full-context capacity, media compatibility or sustained throughput.

KeepRouter · API reference

Model and evaluation task

Evaluate coding changes against the same repository tests, including a multi-step tool conversation. Sol and Luna have different prices; compare cost per accepted change rather than cost per token alone.

OpenAI · model documentation

API contract and migration

Use Responses for reasoning with tools. Chat Completions tools require reasoning_effort=none. The copyable example uses Responses and a bounded output budget.

OpenAI · model documentation

Customer price and verification scope

The live prices above are KeepRouter customer rates. One fixed input rate covers ordinary input and the supported cache-write or long-context ceiling; no extra cache-write fee is added. Cache hits use the separate cached-input rate. These are not the maker's short-context base prices. Maker specifications and catalog checks do not certify every generation workflow.

KeepRouter · pricing and usage · KeepRouter · workload calculator

How to evaluate GPT-6 Sol

GPT-6 Sol is listed on KeepRouter as text, vision under the exact id gpt-6-sol. Use /v1/responses for the listed route; a maker's upstream features do not automatically apply to this gateway endpoint. The published context window is 1,050,000 tokens and the published output limit is 128,000 tokens. These are limits, not a recommended request size.

First workload: Start with a text question plus one representative image, then repeat the same question with text only. Compare answer quality, latency and billed input/output tokens.

Before production: For agent use, test tool calls and structured output on this exact model route before production; an OpenAI-compatible chat endpoint alone does not prove either feature.

Agent setup paths

OpenAI SDK (Responses)

Use the SDK's responses.create operation with the exact model gpt-6-sol. In an agent product, select an adapter that emits /v1/responses; a Chat Completions configuration is not an equivalent tool integration. Preserve complete returned conversation items between tool turns. Official setup.

import os
from openai import OpenAI
client = OpenAI(base_url="https://keeprouter.com/v1", api_key=os.environ["KEEPROUTER_KEY"], max_retries=0)
r = client.responses.create(model="gpt-6-sol", input="Reply with one short greeting.", reasoning={"effort": "low"}, max_output_tokens=1024, store=False)

These are documented configuration paths; model-specific tool, streaming and multimodal behavior still needs a real request test.

Public model usage evidence

No public, exact-variant usage figure has been verified for this KeepRouter model id. Missing data is not zero usage; family-level or maker-wide traffic is not presented as this model's traffic.

Published examples and cases

No exact-model customer case has been verified for this entry. The workload above is an evaluation recipe, not a claim of a public deployment.

Source and verification boundary

Official GPT-6 Sol documentation. KeepRouter's live catalog is authoritative for the customer price and enabled endpoint shown here; the maker remains authoritative for upstream model capabilities and limits.

Pricing and implementation guides

Guides

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Catalog facts and prices last changed .

Page content reviewed .