GPT-5.6
GPT-5.6 is OpenAI's newest flagship model, released July 9, 2026, built for agentic coding, long-horizon reasoning, and tool use. It natively supports Programmatic Tool Calling and predictable caching, and leads agentic and coding benchmarks like Terminal-Bench. Access the GPT-5.6 API on Velokey at a lower price — one API key, pay as you go, below official pricing.
ユースケース
Agentic coding and automation · Repo-scale refactors and migrations
入力
テキスト
出力
テキスト
課金方式
トークン課金
会話を始める
下にメッセージを入力して始めましょう
登録で $0.5 分の無料クレジット。画像を約 20 枚無料生成できます
料金詳細
従量課金の透明な価格設定で、隠れた費用はありません。
料金詳細
段階料金使用量ベースの料金内訳
| 仕様 | 価格 | 公式価格 | 節約 |
|---|---|---|---|
| Input/1M tokens | 4 クレジット≈$4 | 5 クレジット | -20% |
| Output/1M tokens | 24 クレジット≈$24 | 30 クレジット | -20% |
| Cache Read/1M tokens | 0.4 クレジット≈$0.4 | 0.5 クレジット | -20% |
| 仕様 | 価格 | 公式価格 | 節約 |
|---|---|---|---|
| Input/1M tokens | 8 クレジット≈$8 | 10 クレジット | -20% |
| Output/1M tokens | 36 クレジット≈$36 | 45 クレジット | -20% |
| Cache Read/1M tokens | 0.8 クレジット≈$0.8 | 1 クレジット | -20% |
課金ルール
- 出力価格はモデル、解像度、品質、時間、トークン使用量によって変動します。
- アップロードした参照ファイルは、対応モデルでは別途課金される場合があります。
- ウェブ検索や画像検索などの追加機能はリクエストごとに課金される場合があります。
- トークンベースのモデルは入力・出力トークン数で課金されます。
- メインルートが利用できない場合、Velokey は可能な範囲で安定したフォールバックルートに自動的に切り替えることがあります。
- 従量課金制で、クレジットは透明に差し引かれます。
* 最終的な費用は生成結果によって異なります。
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Affordable GPT-5.6 API
Access OpenAI's newest flagship, GPT-5.6, at a lower price on Velokey — OpenAI-compatible, one API key, pay as you go, below official pricing.
Meet GPT-5.6 and its API integration
GPT-5.6 is OpenAI's newest flagship model, released July 9, 2026, built for agentic coding, long-horizon reasoning, and tool use, and it leads a range of agentic and coding benchmarks. On Velokey you can access the GPT-5.6 API at a lower price — one API key, pay as you go, below official pricing, no forced subscription — with credits, usage, and multi-model routing all managed in one console.
Programmatic Tool Calling
GPT-5.6 can write JavaScript and run it in an isolated, network-free V8 sandbox, orchestrating multi-step tool calls in code to cut round trips. Compared with one-call-at-a-time function calling, it's more efficient and controllable in complex agentic workflows, terminal operations, and computer use — the headline upgrade of this generation.
View docs →
Benchmark-leading agentic and coding
On agentic and coding benchmarks like Terminal-Bench, the Coding Agent Index, and Agents' Last Exam, GPT-5.6 leads across the board — a fit for long-horizon multi-step workflows, repo-scale refactors, and automated agents. For the hardest reasoning tasks, max reasoning and ultra modes push depth further.
View docs →
Predictable caching and long context
New predictable caching makes repeated-prefix cache hits more reliable, meaningfully lowering input costs for long flows and multi-turn conversations; long context keeps very long documents, large codebases, and long conversations coherent — a fit for knowledge analysis and repo-scale tasks.
View docs →
Flexible tiers, OpenAI-compatible
GPT-5.6 offers three callable model IDs — gpt-5.6-sol, gpt-5.6-terra, gpt-5.6-luna — sharing one request structure and parameters, so you can trade performance against cost per task (bare gpt-5.6 is a family alias; specify a concrete ID, most starting on gpt-5.6-terra). One API key reaches GPT-5.6 and other vendors' models, OpenAI-compatible, switching with a single model-field change.
View docs →
How to deploy the GPT-5.6 API on Velokey
A few steps to start calling.
Register and get an API key
Create an API key in the Velokey console; one key authenticates every request sent to GPT-5.6.
Set the model
Set model to gpt-5.6-sol, gpt-5.6-terra, or gpt-5.6-luna. Bare gpt-5.6 is a family alias and can't be called directly; most workloads start on gpt-5.6-terra.
Call and integrate
Send requests through Velokey's unified /v1/chat/completions endpoint, compatible with the OpenAI calling convention, with usage and credits managed in one console.
GPT-5.6 real-world use cases
From agentic coding to long-document analysis, a fit for many high-value scenarios.
Agentic coding and automation
Long-horizon multi-step workflows and autonomous tasks, orchestrating tools in code with Programmatic Tool Calling and fewer round trips.
Repo-scale refactors and migrations
Large refactors, framework upgrades, and cross-repo migrations, staying coherent with strong agentic ability and long context.
Terminal operations and computer use
Complex terminal operations, browsing, and computer use — at their best with max reasoning or ultra.
Long-document and knowledge analysis
Analysis and Q&A over long contracts, financial reports, and research material, with predictable caching lowering multi-turn cost.
High-throughput batch and extraction
Classification, tagging, routing, short summaries, and bulk generation pipelines, cost-controlled with pay-as-you-go.
Security and frontier research
Frontier agentic research and vulnerability analysis — give the hard work to benchmark-leading GPT-5.6.
Why choose Velokey for GPT-5.6
below official pricing
Call GPT-5.6 at a lower price on Velokey — pay as you go, no forced subscription, lower upfront cost.
One key, many models
A single API key reaches GPT-5.6 and other vendors' models, turning task routing and cross-model fallback into configuration rather than rewrites.
Unified OpenAI-compatible access
Compatible with the OpenAI calling convention; switching models is a single model-field change, keeping integration cost minimal.
Stability and high availability
Automatic failover and stable fallback routes maintain availability when the primary route is down, keeping production steady.
API リファレンス
API 呼び出し例とパラメータの完全な説明
Endpoint
https://api.velokey.ai/v1/chat/completionsAuthentication
Bearer YOUR_API_KEYRequest Example
curl https://api.velokey.ai/v1/chat/completions \
-X POST \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.6-sol",
"messages": [{"role": "user", "content": "Hello!"}],
"temperature": 0.7
}'Response Example
{
"id": "req_abc123",
"model": "gpt-5.6-sol",
"created": 1234567890,
"data": { ... }
}GPT-5.6 API FAQ
What is the GPT-5.6 API?
GPT-5.6 is OpenAI's newest flagship model, released July 9, 2026, built for agentic coding, long-horizon reasoning, and tool use, with native Programmatic Tool Calling and predictable caching. On Velokey you call it through unified OpenAI-compatible access.
Which model IDs can I call for GPT-5.6?
The callable IDs are gpt-5.6-sol, gpt-5.6-terra, and gpt-5.6-luna, sharing the same request structure and parameters and spanning flagship to high-throughput value. Bare gpt-5.6 is a family alias and can't be called directly — specify a concrete ID in the model field; most workloads start on gpt-5.6-terra.
What is Programmatic Tool Calling?
GPT-5.6 can write JavaScript and execute it in an isolated, network-free V8 sandbox, orchestrating multi-step tool calls in code to cut round trips. It's especially useful for complex agentic workflows, terminal operations, and computer use.
Is GPT-5.6 good for long documents and long context?
Yes. It supports long context and stays coherent across very long documents, large codebases, and multi-turn conversations, with predictable caching lowering the input cost of repeated prefixes.
How is it billed on Velokey?
The pricing section on this page shows current Velokey prices, billed by input and output tokens (about $4 input / $24 output per 1M tokens, official $5/$30). One API key reaches every callable ID, and credits are managed from one Velokey account.