You know what Claude Code costs per seat. But do you know which sessions burned the budget, which model did the work, or whether your cache paid off? LangWatch now tracks every Claude Code session: tokens, costs, cache hits, bash commands, MCP tool calls, file edits, and full terminal replays. Works with Claude Code, Codex, Gemini CLI, and opencode. Free for individuals. Start with: npx langwatch claude
This is the 4th launch from LangWatch. View more
Claude Code usage tracking by LangWatch
Launching today
Track Claude Code usage: cost, cache, session replay. Run `npx langwatch claude` once. Every session gets cost with cache reads/writes as separate token classes, every bash and MCP call as a span, theoretical vs billed for your Max plan, and a full terminal replay in the UI. Works for Codex too.
Free
Launch Team
congrats on the launch! Does this use any bandwidth during the session? Especially long ones
LangWatch
@mathias_barboza thanks! Nope langwatch doesn’t sit in between
Congrats! One feature I'd enjoy is benchmarking cost efficiency across different coding models for the same task. Is that possible?
LangWatch
@himani_sah1 yes, absolutely! This can be done with our experimentation and agent simulations features.
Using our API or MCP, you can grab real cases from tasks you ran through your coding usage and make them as test cases to rerun on different models. Then you can clearly see which ones managed to achieve the goal most successfully, and what was the time and cost to do so
LangWatch
@himani_sah1 Absolutely- you can build you own analytics view for that: sessions running in parallel, cost per session, model, etc! Good luck, and let us know!
Congrats on the launch! Seeing which Claude Code session actually burned the budget instead of guessing would be a relief, and the cache reads split out as their own token class is a thoughtful detail. How would this work for a small team, can we see everyone's sessions in one shared view or is it one workspace per developer?
LangWatch
@doganakbulut both options are available. There is the possibility to work as a team view teams sessions as well as an admin dashboard to keep more control over all
does the terminal replay work for headless/CI runs with no TTY, or does capturing the replay need an actual interactive session? we run a chunk of our agent work in CI and cost visibility there is usually the blind spot
GrowMeOrganic
Most observability tools focus on applications. This one focuses on the developers building them. Good to have LangWatch back on PH.
LangWatch
@iamanantgupta Thanks! It has been some time since our latest launch and indeed, this was just so much value to our own team that we had to launch it here again to other developers!
Its a much broader trend we see moving from building custom agents/apps towards anyone building with claude, co-pilot, codex solutions, so broader view / visibilty is required to keep control! More to come!
I'm bookmarking this. Comparing theoretical cost against what I'm actually billed on Max is something I've wanted for a while.
LangWatch
@ramish_saje go try it once you've found some time to track it, it will only take. you acouple of minutes!