IBM Bob vs. Letta Code

Feature	IBM Bob	Letta Code

Tagline	Your AI SDLC (Software Development Lifecycle) partner from IBM	The memory-first coding agent
Website	https://bob.ibm.com	https://letta.com
Language	javascript	typescript
Release Date	September 2, 2025	December 16, 2025
Last Updated	May 20, 2026	June 3, 2026
Provider Type	AI Lab	Independent
MCP Support	Yes	Yes
Multi-Agent Support	Yes	Yes
Git Integration	deep	basic
Multi-File Editing	Yes	Yes
Auto Test Running	Yes	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	No	No
IDE Integration	Bob IDE	None - terminal only
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	No	Yes
Context Window	Model-dependent	Model-dependent
Terminal Bench 2.0		#48 · 59.1% ±2.4 ²
Supported Models	Multi-provider (IBM-managed)	Multi-provider with Claude, GPT, Gemini and self-hosted (BYOK).
Pricing Model	Freemium	Freemium
Free Tier	Yes	Yes
Price Range	Free / $20-200/mo	Free (BYOK) / $20-200/mo
Source Code Availability	Proprietary Software	Open Source (Apache-2.0)
Source Code	https://github.com/IBM/ibm-bob	https://github.com/letta-ai/letta-code
Development State	active	active