Gemini 3.6 Flash vs Claude Fable 5.1
Compare Gemini 3.6 Flash 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
Gemini 3.6 Flash vs Claude Fable 5.1 Overview
Everything you need to know about these AI models, including capabilities, performance, pricing, and technical details.
Google / Gemini 3.6 Flash
proDescription
Google's newest Flash-tier model and its default workhorse, built on Gemini 3.5 Flash. Gemini 3.6 Flash pairs strong coding and agentic work with the broadest input range available, reading text, images, audio, video, and PDFs across a very large context. Google tuned it to reach conclusions in fewer steps, so it is faster and cheaper to run than its predecessor.
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
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Google / Gemini 3.6 Flash
proToken-Efficient Coding
Google reports meaningful coding gains over the previous Flash model, reaching results in fewer reasoning steps and tool calls. Built for agents that move across many files and coordinate several actions in one run.
Fewer Steps To Answer
Tuned to say less and reach a conclusion sooner. Google reports it using notably fewer output tokens than the previous Flash model for the same work, which cuts both cost and latency.
Room For Repositories
A very large context window carried over from the previous generation. Load a full repository, a long document set, or hours of media in one request and work across it without chunking.
Document And Report Work
Early customers cite gains in document parsing, chart and data analysis, and report drafting. Suited to knowledge work over large, mixed source material rather than long-form prose.
Recent Knowledge And Search
Its knowledge is the most current in the catalog, and it supports Google Search grounding, so it can pull live information into an answer. Computer use is built in as a tool.
Text Image Audio Video
Google's model card lists text, images, audio, and video input, plus PDFs. Output is text. Among the broadest input ranges available, and unusual in handling both audio and video.
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.
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