
GPT-6 Astra vs Gemini 3.8 Flash vs Claude Fable 5.1: Which AI Model Should You Choose in 2026?
An evidence-based comparison of GPT-6 Astra, Gemini 3.8 Flash, and Claude Fable 5.1 for reasoning, coding, research, agents, and API cost.
I help prepare projects for development, run technical audits, and design AI integrations. Each service below states the scope of work and the concrete deliverable.
Discuss a projectI’ll turn scattered ideas and requirements into a practical plan: what to build first, how the product fits together, and what developers need to start.
If you already have an idea but are not sure where to start, I’ll help break it down into features, define the first version, and turn the requirements into something developers can work with.
You’ll get a document you can use to discuss development time and cost without explaining the whole idea again to every contractor.
I’ll review the site or application, explain what gets in the way of users and development, and order the fixes by priority.
I’ll review an existing website or application, find technical problems and user-facing friction, and identify what is worth fixing first.
You’ll get a direct report: the problem, its impact, how to verify it, and the next step.
I’ll check whether AI is actually useful for the task, compare suitable models, and estimate the running cost.
I’ll check whether AI is actually useful for the task. If it is, I’ll help choose a model, estimate the running cost, and design the integration.
You’ll get a recommended approach, a shortlist of suitable models, and an estimate of the running cost. If needed, I can also build a working prototype.

An evidence-based comparison of GPT-6 Astra, Gemini 3.8 Flash, and Claude Fable 5.1 for reasoning, coding, research, agents, and API cost.
A couple of paragraphs is enough: what you already have, what you want to achieve, and where you are currently stuck. I’ll read it and ask any follow-up questions.