@ATCalderi
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CEO @coworkerapp previously @uber
San Francisco, CA
Joined January 2011
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Today, we dropped the price of enterprise AI by 80%.
Same frontier AI. Same chat, cowork, and code experience.
Just 5x more tokens for the same spend.
Here’s how and why. 👇 Also, we made a video. Please enjoy.
Alex Calder retweeted
Congrats to @coworkerapp on OM2! The next step for enterprise AI that actually works isn't a bigger model, it's memory.
Alex Calder retweeted
Don’t use AI that forgets after every session. Bring your context to any model. Love what @ATCalder and @HeresTheChurch have built!
9x cheaper, 64% faster, preferred on quality 84.5% of the time. No change to your existing workflows.
Alex Calder retweeted
If anyone is curious what a true software factory looks like. Check out what happened to our Principal engineer's velocity after he launched our first factory.
His project was building a pipeline for printing data connectors, not just building one connector at a time.
Alex Calder retweeted
It was great being on Bloomberg @business this morning to discuss all things @CallosumAI
Callosum Technologies co-founder Danyal Akarca explains how the UK startup is looking to match AI workloads with the right combination of chips and models to cut costs and improve efficiency bloom.bg/4xcPOrr
Coworker lets you chat, cowork and code with your organisational context across any model, open or closed. What a time to be alive.
It is clear open source models and harnesses are having a moment. There's a few factors at work
1/ It is now obvious that you can catch up to near-SOTA performance and do so with a clear training lineage. See:@thinkymachines Inkling launch today.
2/ There are several well-funded, talented teams building open weight models now in the US and abroad. Along with the explosing of other near SOTA models (Grok/Cursor, Muse Spark), it is clear we are going to have a diverse ecosystem of models atleast on coding and agentic use.
3/ Organizations are increasingly looking for control over how their data is used and are willing to trade off some access to frontier level tokens for this control. Organizations and countries are increasingly nervous about the frontier labs potentially competing with them down the road and don't want their data to enable a future competitor.
4/ Open source is a slider: you could bring your own open harness, your evals, your business context and are free to pick and choose your model of choice.
5/ Companies have now actively shifted from "how do we get our people to use tokens" to being uncomfortable with their token cost ballooning without a clear line to revenue.
6/ Geo-politically, countries will be weighing open weight models as a way to get frontier-level tokens inside controlled environments that may not be otherwise possible.
All of this leads to more choice for all of us !
Alex Calder retweeted
It is clear open source models and harnesses are having a moment. There's a few factors at work
1/ It is now obvious that you can catch up to near-SOTA performance and do so with a clear training lineage. See:@thinkymachines Inkling launch today.
2/ There are several well-funded, talented teams building open weight models now in the US and abroad. Along with the explosing of other near SOTA models (Grok/Cursor, Muse Spark), it is clear we are going to have a diverse ecosystem of models atleast on coding and agentic use.
3/ Organizations are increasingly looking for control over how their data is used and are willing to trade off some access to frontier level tokens for this control. Organizations and countries are increasingly nervous about the frontier labs potentially competing with them down the road and don't want their data to enable a future competitor.
4/ Open source is a slider: you could bring your own open harness, your evals, your business context and are free to pick and choose your model of choice.
5/ Companies have now actively shifted from "how do we get our people to use tokens" to being uncomfortable with their token cost ballooning without a clear line to revenue.
6/ Geo-politically, countries will be weighing open weight models as a way to get frontier-level tokens inside controlled environments that may not be otherwise possible.
All of this leads to more choice for all of us !
Given this is a 2.8T model, my guess is capabilities land somewhere around Fable (and well ahead of Opus 4.8). That is insane for an open model.
Alex Calder retweeted
Benchmark’s @peterfenton says 90%+ of tokens could come from open weight models in the next 18-24 months, pressuring frontier model margins.
Full convo at 12p PT/3p ET on the livestream, plus @AravSrinivas on Perplexity’s new orchestrator model and @jmorgan on why enterprises are moving toward AI models they can download and control
Alex Calder retweeted
I tried Coworker’s Open Artifacts today, and I was genuinely impressed. I asked it to build a dashboard, and it automatically selected the most suitable model for the task without needing any extra instructions.
It’s one of the few AI tools I’ve used recently that feels intuitive right from the start instead of making me wrestle with the interface.
For once, I felt like an absolute god.
Alex Calder retweeted
most AI tools make something good and it just sits locked on your computer, only you can see it
coworker's Artifacts flips that: build a deck or dashboard, share it with your team in clicks
not just the result, the template too, so no one has to reinvent the wheel
🤝 Paid partnership
Tea is being thrown into the harbor
🚨 YOU'RE OVERPAYING FOR AI BY 5X. AND ALMOST NOBODY HAS NOTICED.
every task you run goes to the most expensive model, even when an open model one nails it for a fraction of the price (yes, the one china dropped during the Fable 5 ban benchmarks near Opus 4.8).
You can fix it and save thousands with this new tool:
→ it routes each task to the right model, open or closed, automatically
→ same frontier quality, ~5x less in tokens
→ ask for a deck, dashboard, doc or app, get better results with less.
I ran it on real client work and they couldn't tell the difference. except in the bill lol.
stop paying frontier prices for intern tasks.
Alex Calder retweeted
Today's a giant upgrade for Coworker: Open Artifacts.
Our vision for Coworker.ai is to be the best place for any team to get real work done, natively AI enabled for collaborating with both humans and their agents. Now we're unlocking the next phase of that vision.
Alex Calder retweeted
Replying to @coworkerapp
honestly the context problem is why i stopped using half these tools. glad someone's finally taking it seriously
You can now create beautiful docs, decks and spreadsheets with @coworkerapp, 80% cheaper. Check it out!
We kept hearing the same problem from Codex and Cowork users:
We like building stuff, but all that context blows a hole in token budgets.
Open Artifacts routes the work to the right model and context, for 4-5x less cost.
The outputs are genuinely beautiful.
Alex Calder retweeted
Introducing Open Artifacts by Coworker.
Build beautiful work products, routed to the right model for every task.
Frontier outputs. Exactly the right context. 80% lower cost.
Monty Python with a consolation prize youtube.com/watch?v=PrvXoin9…
What @coinbase did is impressive but 99% of companies can't do this.
@coworkerapp let's any company do this out-of-the-box
How to keep AI spend flat while token usage grows exponentially: Not with friction and spend alerts. With better defaults, routing, and caching.
Better Defaults (not Usage Caps) – Engineers can choose any model they want, but defaults matter. We’re experimenting with defaulting to open weight models like GLM 5.2 and Kimi 2.7 through our LLM gateway, while still encouraging engineers to choose the right model for the task. 91% of our employees were never hitting their usage caps, so instead of lowering caps and driving up alerts, we're moving to cheaper defaults. Note that code reviews use a diversity of models, so they can check each other's work.
Better Routing – In our custom harnesses, we preprocess prompts and route to the best model for the job, considering cache hits and model pricing. For instance, you may want a frontier model for planning, but not for execution where they can be overkill. Ultimately, humans shouldn't be choosing models - AI can automate this task.
Better Caching – Cache misses are the easiest way to drive your cost up. All of our requests are cache aware, so we’re reusing a warm cache wherever possible. For example, our cache hit rate went from 5% → 60% in LibreChat once properly implemented.
Keep Context Lean – Start fresh sessions when switching tasks. Scope file context narrowly. Disconnect unused tools. Don't just compact. The goal isn't fewer tokens used, it's fewer tokens wasted.
Better Visibility – Our engineers can use as many tokens as they want, from whatever model they want, but we’ve made usage visible – and the more you spend on AI, the more impact we expect.
The goal isn't to suppress usage. It's to build the infrastructure that makes exponential growth sustainable.
Putting this into practice has cut our AI spend nearly in half, while our token usage continues to grow.