Page last updated:
October 16, 2025
OpenAI Apps SDK Developer Mode is now open for testing. This gives you a chance to discover and refine conversational logic for your app in the coming weeks. It's also an opportunity to get ahead before app submissions begin.
What we know:
What we don't know:
Our take: Ask yourself three qualifying questions in the next section. If you meet all three, start building now.
"We analyzed the seven launch partners OpenAI picked. They all compress multi-step workflows into single requests. Booking.com surfaces when you mention Paris and dates. Spotify appears for playlist requests. But most companies that reached out to us are porting mobile apps - and that's backwards."
— Łukasz Koczwara, CTO, STX Next
Based on our analysis, here are three things you need to confidently start building on OpenAI Apps SDK now.
If you miss one, we believe you can wait until we have more information.
Examples:
Doesn't work: Visual design, browsing, social features, anything requiring sustained engagement.
Examples: Customer records, transaction history, proprietary databases worth $500K+ annually.
Doesn't work: Public information, generic aggregation, content ChatGPT already knows.
Examples: Healthcare scheduling, B2B procurement, legal research, financial planning, recruiting, corporate travel, home services.
Claimed: Travel (Booking.com), real estate (Zillow), music (Spotify), design (Canva), general learning (Coursera).
Coming soon: OpenTable, Target, DoorDash, Uber, Peloton.
Have all three? Keep reading.
Missing one? Book the assessment to learn what needs to change.
Missing all three? Hold off for a while and reassess in 2026.
It's early but this how we approach developing apps using OpenAI Apps SDK:
Week 1: Analyze if your category is open, if competitors are building, if you should proceed.
Weeks 2-3: Design MCP architecture (works across ChatGPT, Claude, Gemini), audit your backend, identify blockers.
Weeks 4-14+: Build, integrate, test in Developer Mode.
What you get: Full code ownership, MCP documentation, OAuth 2.0 authentication, platform expansion playbooks, at least 30 days support.
Speak directly with Łukasz, our CTO, for a 45-minute category analysis, technical feasibility review, and ChatGPT app development timeline estimates.
Submissions open Q4, likely December. Developer Mode is open now. You need a couple of weeks to learn how users actually talk so if you qualify, it's best to start building now.
Your MCP server gets user prompt and relevant context. Your data never goes to OpenAI. You control what returns.
No. ChatGPT controls surfacing. We optimize for intent capture. We guarantee MCP architecture that works across all platforms without rebuilding.
They will but MCP means you're not locked in. When Claude, Gemini, Microsoft launch apps, you deploy immediately.
Internal if you have conversational AI expertise. Hire if you're learning. Mobile app skills don't transfer.
Healthcare scheduling, B2B procurement, legal research, financial planning, recruiting, corporate travel, home services.
We're a 500-person software development company in Poznań, Poland. For 18 years, we've built data platforms and AI integrations for enterprise clients: complex API architectures, real-time data processing systems, conversational interfaces for internal tools.
The ChatGPT Apps SDK dropped just a few weeks ago. No one has a 2-year track record here. What we have: experience building the exact infrastructure ChatGPT apps require (MCP servers, authentication flows, multi-platform APIs), and weeks of obsessive analysis since October 6th.
We've already turned down 14 of 30 ChatGPT projects because they shouldn't be built yet.
We're optimizing for apps that work, not project volume.
1. Build a ChatGPT app now, using the Developer Mode
2. Wait until early 2026 to build
3. Don't build at all or wait longer
1. Category analysis for your ChatGPT app
Is it open? Who's building now? What intent triggers can you own?
2. Technical readiness for OpenAI Apps SDK development
Is your backend ready? What integrations needed? What's the real timeline and cost?
3. Build / wait / don't build recommendation
Based on the data above, we tell you which and why.
You keep everything we develop during our consultations: Category analysis, competitive intel, technical assessment, timelines, cost estimate.
If you wait until the 2026 to do anything, you'll miss out. Instead, make an informed decision about your options today: build, wait, or don't build.
Page last updated:
October 16, 2025