{"slug": "openai-decisions-api-replace-your-routing-logic-with-one-call", "title": "OpenAI Decisions API: Replace Your Routing Logic With One Call", "summary": "OpenAI shipped a Decisions API at DevDay 2026 that returns one answer from a fixed list of valid options in about 150 milliseconds, using a specialized variant of GPT-6 Luna tuned for constrained classification rather than generation. According to The Decoder's DevDay coverage, OpenAI tested the API on a computer task simulation and got 76 correct choices out of 78 scored steps at roughly 230 milliseconds per call, about 10x faster than standard Luna through the chat API. OpenAI has not announced Decisions API pricing, while competitor TypeSafe's Jev offers $0.042 per million input tokens, roughly 161 milliseconds median latency, and a 0% structural error rate but is text-only.", "body_md": "OpenAI shipped a new API at DevDay 2026 that targets one of the most wasteful patterns in agent development: calling a full language model to make a decision that has three possible answers. The **Decisions API** takes context and a fixed list of valid answers, picks one, and returns it in about 150 milliseconds. No generation. No JSON parsing. No surprises.\n\n## What It Is (and What It Isn’t)\n\nThe Decisions API is not a chat completion with a structured output schema. It runs a specialized variant of GPT-6 Luna tuned for constrained classification — not generation. You give it three things:\n\n- **Context** — text or an image describing the current state\n- **A question** — what decision needs to be made\n- **A finite set of valid answers** — the only options it’s allowed to pick from\n\nIt returns one answer from your list plus a confidence score. It cannot invent a new answer. That constraint is the feature, not a limitation. [According to The Decoder’s DevDay coverage](https://the-decoder.com/openai-expands-codex-and-its-api-at-devday-with-security-scans-a-decisions-api-and-ultrafast/), OpenAI tested it on a computer task simulation and got 76 correct choices out of 78 scored steps at around 230 milliseconds per call — roughly 10x faster than calling standard Luna through the chat API.\n\n## Three Use Cases Developers Will Actually Reach For\n\n**Agent routing.** In a multi-agent pipeline, after each step you need to decide which agent handles the next one. The old pattern is a full chat completion, JSON parsing, error handling, retries. The new pattern: pass your current state as context, define your agents as answer options, get a decision in 150ms. At that latency you can run multiple routing decisions per second without inflating your inference bill.\n\n**Content classification.** Sorting support tickets into billing, technical, sales, and spam has always been a job for a language model. A Decisions API call eliminates the generation overhead — you get a guaranteed valid category back, no parsing required. For teams processing thousands of tickets per hour, that latency difference compounds fast.\n\n**Real-time control loops.** Robotics, trading systems, and game AI all need sub-200ms decisions. Standard GPT-6 Luna runs around 1.6 seconds per call through the chat API. At 150ms, the Decisions API crosses the threshold for continuous decision loops. The multimodal input — which Jev, the main competitor, lacks — means you can pass screenshots or sensor-rendered images directly as context.\n\n## How It Compares to TypeSafe Jev\n\n[TypeSafe’s Jev](https://pinggy.io/amp/blog/typesafe_jev_system_one_model_use_cases_vs_llms/) has been the default answer for constrained decision-making for the past year, and the comparison is not as clean as OpenAI would prefer.\n\nJev’s advantages are real: $0.042 per million input tokens (output is free), median latency around 161 milliseconds, and a 0% structural error rate by construction — because its architecture makes it mathematically impossible to return an invalid answer type. For pure text, high-volume routing workloads, those numbers hold up.\n\nThe Decisions API hits back with multimodal input (Jev is text-only), native integration with OpenAI’s Agents API and Computer Use, and the single-vendor convenience of staying on a platform most teams already use. If you’re routing based on screenshots or camera feeds, Jev cannot help you.\n\nThe honest verdict: already deep in the OpenAI platform and need multimodal routing? Decisions API is the obvious path once it hits general availability. Optimizing for cost and latency at scale on text-only workloads? Evaluate Jev before committing.\n\n## The Number That Changes Everything: Pricing\n\nOpenAI has not announced Decisions API pricing. This is the variable that determines everything else. [GPT-6 Luna currently runs $0.10 per million input tokens and $0.50 per million output](https://openrouter.ai/openai/gpt-6-luna). If the Decisions API comes in at Luna rates or below, the Jev conversation ends quickly — better platform, multimodal support, comparable price. If OpenAI charges a premium for the speed optimization, Jev retains a clear niche for high-volume text workflows.\n\nWatch the pricing announcement closely. That number tells you more about OpenAI’s strategic intent here than the API itself does.\n\n## Status and How to Access It\n\nThe Decisions API is in limited preview as of September 29. [OpenAI’s DevDay recap](https://openai.com/index/devday-2026-recap/) states a broad release is planned “in the coming days.” Access is through the standard OpenAI developer platform — monitor the API changelog for the rollout update. The endpoint supports both text and image context and integrates with the Agents API infrastructure announced at the same event.\n\nFor the full DevDay 2026 picture — managed agents, plugin extensions, Codex security cloud — see [our DevDay 2026 managed agents coverage](https://byteiota.com/openai-devday-2026-managed-agents/). The Decisions API is one layer of a larger agent platform push. It just happens to be the layer most developers will reach for first.", "url": "https://wpnews.pro/news/openai-decisions-api-replace-your-routing-logic-with-one-call", "canonical_source": "https://byteiota.com/openai-decisions-api-replace-your-routing-logic-with-one-call/", "published_at": "2026-09-29 18:09:42+00:00", "updated_at": "2026-09-29 18:16:38.869800+00:00", "lang": "en", "topics": ["ai-agents", "ai-products", "large-language-models", "ai-tools", "artificial-intelligence"], "entities": ["OpenAI", "Decisions API", "GPT-6 Luna", "TypeSafe", "Jev", "The Decoder", "Agents API", "Computer Use"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/openai-decisions-api-replace-your-routing-logic-with-one-call", "markdown": "https://wpnews.pro/news/openai-decisions-api-replace-your-routing-logic-with-one-call.md", "text": "https://wpnews.pro/news/openai-decisions-api-replace-your-routing-logic-with-one-call.txt", "jsonld": "https://wpnews.pro/news/openai-decisions-api-replace-your-routing-logic-with-one-call.jsonld"}}