Sherpa by Pocket FM

Sherpa is Pocket FM's AI fiction-writing tool, built around a simple trade: you bring the spark, it carries the story to a finished draft. The pitch is "vibe write" — talk through the idea and Sherpa asks the stronger question, finds the story world, raises the stakes, then structures it into scenes.

What separates it from a general-purpose model is the Narrative World Model, Pocket FM's story memory. It holds characters, settings, arcs, scenes and decisions across thousands of drafts and episodes instead of resetting with each prompt — so motives evolve from what a character has lived through, setups and payoffs stay visible, and canon clashes are caught before they become contradictions. Pocket FM measures this as NarrativeWorldBench: 1,204 continuation tests across 38 series, nine dimensions of story structure, horizons up to 200 episodes — where Sherpa held 0.84 plot-beat F1 against 0.65 or lower for frontier models, and native judges scored it 0.78+ in Hindi, Tamil, Telugu and Marathi. Twelve professional writers chose it over every baseline in 62–71% of 240 blind sessions. It runs at $0.85 per million output tokens.

Sherpa also finishes the job: it reads a draft the way an editor and an audience would (engagement, readability, prose, coherence, pacing), localises a story by adapting names, places, idioms and cultural references rather than translating word for word, and narrates the localised draft as a studio-grade audio episode. It is free, and it comes from Pocket FM — the Bengaluru audio-series platform founded in 2018, with 250 million+ registered users.