- 1M context
- Reasoning
- Responses API
- NEW · Nov 10
Gemini 4 Carbon on QuickSilver Pro
Gemini 4 Carbon is Google's Gemini 4 model for coding, agent workflows and complex reasoning. Text input, 1M context, and 66K maximum output tokens. $2.00 input / $10.00 output per million tokens; cache reads $0.10, at Google standard list parity.
- 1M context
- 66K max output
- Tools
- Reasoning · on by default
- Streaming
- JSON Schema output
You pay · input / output per 1M
$2.00 / $10.00
At list price
same rates as Google standard list price
Pricing comparison ($/1M tokens)
Bar length = price relative to the list price
| Provider | Input | Output | vs QSP |
|---|---|---|---|
| QuickSilver Pro | $2.00 | $10.00 | — |
| Google standard list price(google/gemini-4-carbon) | $2.00 | $10.00 | same |
Google list source: ai.google.dev/gemini-api/docs/pricing
At a glance
- Context
- 1M tokens
- Input / 1M
- $2.00
- Output / 1M
- $10.00
- Thinks by default
- Yes
- Max output
- 66K
- Latency · live
- —
Coding, agent workflows and complex reasoning over long documents.
When is Gemini 4 Carbon the right call?
Curated from catalog capabilities and published prices, not a benchmark.
When to use
Use Gemini 4 Carbon for coding, agent workflows and complex reasoning with text input. Tools support auto, required and named selection; strict JSON Schema and streaming were verified in upstream probes.
- Long documents and codebases, up to 1M tokens of context
- Agents that call tools, with strict JSON Schema output
- Multi-step reasoning, on by default
- Responses API clients as well as Chat Completions
When to use something else
Reasoning is mandatory. Use reasoning: {effort: "low"}; reasoning: {enabled: false} is rejected. Allow enough output budget for reasoning and the answer. Maximum output is 32,768 tokens. Latency and capacity can vary; test your workload before choosing it for time-sensitive tasks.
Quickstart (curl)
Get an API key →curl https://api.quicksilverpro.io/v1/chat/completions \
-H "Authorization: Bearer $QSP_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gemini-4-carbon",
"messages": [{"role": "user", "content": "Hello!"}]
}'import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.quicksilverpro.io/v1",
api_key=os.environ["QSP_KEY"],
)
response = client.chat.completions.create(
model="gemini-4-carbon",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.quicksilverpro.io/v1",
apiKey: process.env.QSP_KEY,
});
const response = await client.chat.completions.create({
model: "gemini-4-carbon",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);curl https://api.quicksilverpro.io/v1/responses \
-H "Authorization: Bearer $QSP_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gemini-4-carbon",
"input": "Hello!"
}'import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.quicksilverpro.io/v1",
api_key=os.environ["QSP_KEY"],
)
response = client.chat.completions.create(
model="gemini-4-carbon",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)OpenAI-compatible. One-line migration via base_url.
Gateway behavior
Compatibility notes for this model.
prompt- Prompts up to 1M tokens.
max_tokens- Up to 66K output tokens.
- /v1/chat/completions: Supported
- /v1/responses: Supported
- streaming: Supported
- tools: Supported
- image input: Not listed for this model
- JSON Schema: Supported
- reasoning: Supported
Where the price comes from
- Provider reference
- $2.00 / $10.00ai.google.dev/gemini-api/docs/pricing
- Catalog verified
- Prompt cache · not compared
- $0.10 read
usage.cost = prompt_tokens × $2.00/1M + completion_tokens × $10.00/1M
FAQ
Common questions
$2.00 input / $10.00 output per million tokens; cache reads $0.10 per million tokens, at Google standard list parity. Reasoning is charged as output.
1M context and 66K maximum output tokens. Text, streaming, automatic and forced tools, strict JSON Schema passed upstream probes. Image, audio, video and file input have not been verified by QSP.
Use base_url=https://api.quicksilverpro.io/v1, your QSP API key and model="gemini-4-carbon". Chat Completions and Responses are supported through QSP compatibility. Preserve complete assistant messages, including reasoning_details, across tool turns.