Gemini 4 Hydrogen
google/gemini-4-hydrogenGemini 4 Hydrogen is the high-efficiency model of Google's Gemini 4 family, released on November 12, 2026. Google built it for high-throughput agentic workflows, coding and multi-model routing at lower cost and latency than the larger Gemini 4 models. It accepts text, image, video, audio and PDF input with a 1M-token context window, supports adjustable reasoning effort, and supports function calling and structured output.
- Input price
- $1.50USD / 1M tokens
- Output price
- $7.50USD / 1M tokens
- Cache read
- $0.08USD / 1M tokens
- Context window
- 1M
- Max output
- 65.5K
Specifications
- Input
- Text, image, audio
- Output
- Text
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OpenAI-compatible endpoint with unified authentication and usage tracking.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/chat/completions" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "google/gemini-4-hydrogen",
"messages": [
{
"role": "user",
"content": "Hello"
}
],
"max_tokens": 2048
}
SANDBASE_JSON
)
printf '%s\n' "$result"Input Schema
10 parameters · 1 required · 9 optional
| Parameter | Type | Required | Description |
|---|---|---|---|
messages | object[] | Required | — |
seed | integer | Optional | — |
stop | string[] | Optional | — |
tools | array | Optional | — |
top_p | number | Optional | Min: 0 · Max: 1 |
stream | boolean | Optional | Default: false |
max_tokens | integer | Optional | Max: 65536 |
temperature | number | Optional | Min: 0 · Max: 2 · Default: 1 |
tool_choice | string | Optional | — |
response_format | object | Optional | — |
Output Schema
| Field | Type | Description |
|---|---|---|
id | string | Unique identifier for the completion |
object | string | Object type, e.g. "chat.completion" |
model | string | Model used for the completion |
choices | array | List of completion choices |
choices[].message.content | string | Generated text content |
choices[].finish_reason | string | Reason the generation stopped |
usage.prompt_tokens | integer | Number of tokens in the prompt |
usage.completion_tokens | integer | Number of tokens in the completion |
usage.total_tokens | integer | Total tokens used |
Questions
FAQ
How do I call Google Gemini 4 Hydrogen through SandBase?
Create a SandBase API key, then send requests with the model ID "google/gemini-4-hydrogen" to Chat Completions API (/v1/chat/completions) at https://api.sandbase.ai. The request examples on this page show the exact payload.
How much does Google Gemini 4 Hydrogen cost?
$1.50 per 1M input tokens and $7.50 per 1M output tokens, billed per request from your SandBase balance. Discounts, when available, are shown in the pricing on this page.
What is the context window of Google Gemini 4 Hydrogen?
1M tokens of context, with up to 65.5K output tokens per response.
Which features does Google Gemini 4 Hydrogen support?
Google Gemini 4 Hydrogen supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.
Do I need a separate Google account?
No. One SandBase API key and balance gives you access to Google Gemini 4 Hydrogen and the other models in the catalog; you do not need to sign up with Google separately.