Built for Engineering
A frontier reasoning model tuned for STEM, engineering datasets, and technical workflows, with strong tool-calling accuracy and long-context code understanding through the Grok 4.5 API.
Grok 4.5
The Grok 4.5 API gives developers access to xAI's frontier reasoning model, built for agentic software engineering, multi-step tool calling, and long-context code work. On GPTProto the grok 4.5 API runs 40% off — $1.2/1M input and $3.6/1M output tokens — behind a single OpenAI-compatible endpoint.
Ví dụ sử dụng API
curl --request POST "https://gptproto.com/v1/chat/completions" \
--header "Authorization: Bearer $GPTPROTO_API_KEY" \
--header "Content-Type: application/json" \
--data '{
"model": "grok-4.5",
"messages": [
{
"role": "user",
"content": "Hello"
}
]
}'Grok 4.5 Giá
Trò chuyện, tác tử lập trình và xử lý tài liệu. Tính phí trên mỗi 1 triệu token — token đầu vào, đầu vào được lưu vào bộ nhớ đệm và đầu ra được tính phí riêng. GPTProto thấp hơn 40% so với mức giá chính thức.
| Kịch bản | Grok giá niêm yết | OpenRouter | GPTProto | Bạn tiết kiệm / tháng |
|---|---|---|---|---|
| Cá nhân10M token / tháng (4.8M trong cache) | $20.80 | $21.94 | $12.48 | −$8.32≈ $99.84 / năm |
| Nhóm100M token / tháng (48M trong cache) | $208.00 | $219.44 | $124.80 | −$83.20≈ $998.40 / năm |
| Doanh nghiệp500M token / tháng (240M trong cache) | $1040.00 | $1097.20 | $624.00 | −$416.00≈ $4992.00 / năm |
Tiết kiệm $0.00 / tháng
Tiết kiệm hàng năm ≈ $0.00 · trả theo mức sử dụng
Mô hình liên quan
Tất cả mô hình
Grok 4.5Hiện tại
Grok · 500K context · $1.2/M input · $3.6/M output
Bytedance · 262K context · $0.0971/M input · $0.9714/M output
Bytedance · 262K context · $0.0971/M input · $0.9714/M output
Mô hình
Giá: GPTProto
so với giá chính thức
so với OpenRouter
Ngữ cảnh
Độ ổn định
Grok 4.5Hiện tại
Grok
$1.20 / $3.60cho mỗi 1 triệu token
-40%
-43%
500K
Grok 4.5 API
Core features of xAI's Grok 4.5 API on GPTProto — high-throughput serving, native reasoning control, and affordable, pay-as-you-go pricing.
High-Throughput Serving
The Grok 4.5 API streams 80–93 tokens per second, keeping agents and coding tools responsive at real-time speed even under sustained load.
Reasoning Control
A native reasoning_effort parameter lets you scale Grok 4.5's reasoning depth per request — light for fast replies, high for complex agentic and coding tasks.
Affordable Pricing
Affordable grok 4.5 API pricing: $1.2/1M input and $3.6/1M output tokens — a standing 40% off, with pay-as-you-go billing and no monthly minimum.
What Is the Grok 4.5 API?
The Grok 4.5 API is xAI's frontier reasoning model served as a hosted endpoint, so you can send prompts and receive completions without running any infrastructure of your own. On GPTProto it sits behind an OpenAI-compatible interface: point your existing openai SDK at our base URL, drop in a grok 4.5 API key, and the model is live in your stack in minutes.
Grok 4.5 is tuned for agentic software engineering — multi-step tool calling, code generation, and long-context reasoning across large repositories. It takes text input and returns text output, and exposes a native reasoning_effort parameter so you can trade latency for deeper reasoning on the hardest tasks.
Why developers choose the Grok 4.5 API on GPTProto:
- Affordable pricing — $1.2/1M input and $3.6/1M output tokens, a standing 40% off the standard rate, billed per token with no monthly minimum.
- One key, every model — the same grok 4.5 API key also calls grok-4.3, grok-code-fast-1, and 100+ other models, so you can benchmark or fall back without opening new accounts.
- No waitlist — sign up, top up, and get grok 4.5 API access the same day.
Grok 4.5 vs grok 4.3: 4.5 raises tool-calling accuracy and reasoning depth for technical workflows, while grok 4.3 stays a cheaper pick for lighter chat and drafting.
Grok-4.5 Frequently Asked Questions
Common technical questions regarding Grok-4.5 integration and performance.
How does Grok-4.5 handle agentic software tasks?
Grok 4.5 is built for agentic workflows: it plans multi-step tasks, calls tools/functions in sequence, and reasons over long code contexts. Via the Grok 4.5 API on GPTProto it integrates with agent frameworks through a standard OpenAI-compatible schema.
What is the context window for Grok-4.5?
Currently, Grok-4.5 supports a 500,000-token context window. This ensures stability for long-form reasoning. For tasks requiring a full 1M-token window, we recommend using the Grok-4.3 model via our unified API.
How efficient is Grok-4.5 compared to other models?
On the Grok 4.5 API you pay $1.2/1M input and $3.6/1M output — 40% off — while getting 80–93 tokens/sec throughput, making it a cost-efficient frontier option versus the big-three models.
Does Grok-4.5 support native function calling?
Yes. The Grok 4.5 API supports native function/tool calling, so you can register functions and let the model choose when to invoke them — the core primitive for agentic and coding tools.
Can I use Grok-4.5 for real-time applications?
Yes. With 80–93 tokens/sec streaming and a low reasoning_effort setting, the grok 4.5 API is responsive enough for interactive chat, coding assistants, and real-time agents.
How do I control the model's reasoning depth?
Set the native reasoning_effort parameter on each grok 4.5 API request: lower values cut latency and cost for simple queries; higher values give deeper reasoning for hard engineering tasks.
Is the Grok 4.5 API open source?
Grok 4.5 is a proprietary xAI model, not open source. You access it as a managed grok 4.5 API — no weights to host — with GPTProto handling billing and OpenAI-compatible routing.
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