Claude Fable 5.1 and GPT-6 Astra have arrived on Pickaxe! Our latest additions also include Gemini 3.8 Flash, GLM 5.3, and GLM 5.3 Flash, bringing five new releases from Anthropic, OpenAI, Google, and Z.ai to the lineup.
Claude Fable 5.1
Anthropic’s Fable update centers on sustained research, document work, and coding. It can plan a task, use tools, and recover when a step fails, with an emphasis on investigating problems and following the work through.
Fable also understands charts, tables, and diagrams. That combination opens up interesting possibilities for assistants that work through substantial source material and turn their findings into a detailed report or explanation. A research brief with several sources and a specific question to answer is a useful place to start. Anthropic’s overview ·
GPT-6 Astra
Astra brings a new generation of GPT to Pickaxe, with particular attention to the details of a brief. OpenAI has trained it to follow templates, match a requested writing style, and carry earlier requirements forward as a task changes.
Think proposals with a specific structure, reports written for a particular audience, or drafts that develop through several rounds of feedback. Astra is also trained to select the context that matters for the final output, helping it turn extensive background material into focused documents and answers. OpenAI’s announcement
Gemini 3.8 Flash
Google’s latest Flash release focuses on problems that take several steps to solve. On difficult tasks, it can spend additional effort reasoning and make repeated tool calls as it works toward an answer. Google highlights applications in research, coding, and detailed analysis, where the model needs to gather information and work through it carefully. Google’s announcement
GLM 5.3
Z.ai trained GLM 5.3 on complex engineering and research tasks, including work that requires planning, investigation, and checking results. It handles text and supports tool use, with a million-token context window for long instructions, reference material, and conversation history. For builders working on tools with detailed processes to follow, there’s a lot here to explore. GLM 5.3 details
GLM 5.3 Flash
GLM 5.3 Flash introduces native image understanding to the GLM 5 family, alongside reasoning and tool use. Screenshots, charts, and photos can become part of the conversation. A few ideas to try: a support assistant agent that helps explain an error screenshot, a tutor that walks through a diagram, or a tool that turns a chart into a written explanation. GLM 5.3 Flash details
All five are now in the model selector. Give them a try and let us know how they’re working for you!