Merge Gateway Adds Claude Fable 5.2

This turns a frontier-model launch into a practical infrastructure upgrade for teams that already abstract model providers behind one control plane. The main value is faster adoption; the main risk is assuming API compatibility means behavioral compatibility.

• –Long-context coding and research agents can process substantially larger working sets.
• –Merge’s routing, budgets, and data controls make it easier to introduce Fable 5.2 selectively.
• –Developers should test real workloads, especially tool use and multimodal flows, rather than relying only on benchmark claims.
• –Anthropic flags migration concerns around model-specific thinking blocks, adaptive reasoning, and legacy computer-use tools.
• –The unified gateway approach reduces vendor lock-in while preserving the option to route simpler tasks to cheaper models.