GPT-6.1 Sol vs Claude Fable 5.1
Compare GPT-6.1 Sol and Claude Fable 5.1 side-by-side. See comparisons of price, response speed, accuracy, and file support to choose the best model for your task.
Overview
GPT-6.1 Sol vs Claude Fable 5.1 Overview
Everything you need to know about these AI models, including capabilities, performance, pricing, and technical details.
OpenAI / GPT-6.1 Sol
proDescription
OpenAI's upgrade to GPT-6 Sol, the balanced model in its GPT-6 family. GPT-6.1 Sol approaches OpenAI's highest-end GPT-6 model on agentic coding and professional work at a much lower cost, and OpenAI reports fewer factual errors than GPT-6 Sol. It reads text and images across a very large context, supports web search and tools, and offers reasoning effort from low to max.
Anthropic / Claude Fable 5.1
maxDescription
Anthropic's most capable generally available model, sitting above the Opus line. Fable 5.1 is built for long, unsupervised work: multi-day coding, agentic research, and tasks that run across dozens of tool calls. It reads text and images, maintains a very large context, and reasons before every answer at an adjustable depth. Its knowledge is the most recent of any Claude model. Anthropic positions Opus 5 as the starting point for most work, and Fable 5.1 for teams whose evaluations demand a higher ceiling.
About
About
Capabilities
Capabilities
Comparison
Why Use GPT-6.1 Sol and Claude Fable 5.1?
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OpenAI / GPT-6.1 Sol
proNear-Top Agentic Coding
OpenAI reports it matches its highest-end GPT-6 model on a real-world coding test at a fraction of the cost, and beats GPT-6 Sol while using less reasoning effort.
Effort Low To Max
Reasoning effort runs low, medium, high, xhigh, and max, defaulting to medium. Unlike GPT-6 Sol, it has no off setting, so every answer includes some reasoning.
Room For Whole Projects
A very large context window. Load an entire codebase or a long document set and work across it in one request, with strong results on questions about complex documents.
Business Knowledge Work
OpenAI positions it for professional work, including document understanding and multi-step business workflows. It is more open about its limits and more careful about respecting user intent than GPT-6 Sol.
Search And Factual Accuracy
Supports web search and tools for current information. OpenAI reports fewer factual errors than GPT-6 Sol, close to the error rate of its highest-end GPT-6 model.
Text And Image Input
OpenAI lists text and image input, with text output. Send screenshots, diagrams, or charts alongside your question. Audio and video are not supported.
Anthropic / Claude Fable 5.1
maxLong-Running Coding
Anthropic's strongest model for multi-day coding sessions and codebase research. Built to sustain complex software engineering across many steps and tool calls without a human checking in at each one.
Adaptive Thinking Always On
Reasoning is always on, with adjustable effort rather than an on-off switch. Steer depth up for the hardest problems or down for lighter work, without restructuring the prompt each time.
Room For Whole Projects
A very large context window, among the largest available. Load an entire codebase, a long research corpus, or a large document set and work across all of it in a single session.
Document-Heavy Analysis
Built for document-heavy analysis and multi-step automation alongside coding. Suited to work that reads across large, mixed source material and produces structured, reviewable output.
Long-Horizon Agent Work
Its defining strength. Retains context, uses tools, evaluates results, and works on a task through many steps. Built for agents who run for a long time with little supervision.
Text And Image Input
Reads text and images in the same prompt, so you can send screenshots, diagrams, or scanned pages alongside your question. Output is text only. Audio and video are not accepted.
Why Aymo
Why chat with GPT-6.1 Sol and Claude Fable 5.1 on Aymo AI?
Aymo gives you more than access to GPT-6.1 Sol and Claude Fable 5.1—it provides a complete multi-model AI workspace designed for productivity.
Compare Responses
See how GPT-6.1 Sol and Claude Fable 5.1 performs alongside Claude, Gemini, Grok, and other leading AI models.
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