You pay $20 a month for an AI coding assistant. It autocompletes your functions, runs background agents — neat little autonomous daemons that write and test code while you refill your coffee — and makes you feel like you hired a junior dev for the price of a pizza. Best deal in tech since piracy went mainstream.

Here's the thing about deals that look too good: someone's paying. Every line your assistant generates costs real inference compute. Your flat subscription doesn't cover the actual bill. Somebody's eating the difference, and last week two companies showed exactly who — by making opposite choices.

The fork

April 17: TechCrunch reported Cursor is raising over $2 billion at a $50 billion valuation. Over a million paying customers, roughly 70% of Fortune 1000 adoption. Money printer go brrrr.

April 20: GitHub slammed the brakes. Paused all new individual signups for Copilot Pro, Pro+, and Student plans. Yanked Opus — Anthropic's most powerful model — out of the $10/month tier entirely. Locked the latest Opus 4.7 behind $39/month Pro+, where per-token costs run roughly 3.5x higher than the base tier.

The subtext was barely sub: power users running agents 24/7 cost GitHub way more than $10/month, and Microsoft got tired of writing the check. The Register confirmed weekly Copilot costs nearly doubled since January. Internal docs leaked on April 18 hint at token-based billing — paying per bite instead of buffet-style. The all-you-can-eat era ends with a stomach ache.

The Netflix bet

Cursor looked at the same math and said "nah, hold my venture capital." Keep the flat rate. Subsidize the heaviest users. Bet that inference costs drop fast enough for unit economics to work before the war chest runs dry.

The bet isn't blind. Epoch AI's inference price tracking (updated Q1 2026) shows costs dropping roughly 50x since early 2024 — a $1 query then runs about two cents today. If that trajectory holds even at a slower pace, flat-rate subscriptions become viable. If it stalls, $2 billion buys time but not salvation.

And Cursor has a sneaky hedge. On March 22, Cursor acknowledged its Composer 2 model is built on Moonshot AI's open Kimi K2.5, fine-tuned through Fireworks AI. It scores 61.7% on Terminal-Bench 2.0 at one-tenth the cost of Claude Opus 4.6, pumping out 200+ tokens per second. Instead of renting frontier models at whatever Anthropic charges this quarter, Cursor owns its cost floor. Smart. Possibly smart enough.

Three ways the buffet closes

The whales eat everything. One developer running background agents all day burns 10–50x more tokens than autocomplete Andy on the same $20 plan. GitHub just proved this kills margins at scale. Cursor looked at that corpse and said "we're different."

Cheap ≠ good enough. Composer 2 is fast and cheap, but devs who've tasted Opus or GPT-5 don't downgrade with a smile. Cursor still routes hard problems to expensive third-party models — meaning the "we control our costs" story has a giant asterisk.

The cost curve is not a law of physics. The 50x decline since 2024 is real — driven by hardware improvements and provider competition, neither of which Cursor controls. If the curve flattens, that VC money stops being a bridge and becomes a permanent subsidy. And VCs hate the word "permanent."

Your move

If you're on Cursor's $20 plan running agents all day, you're dining at a VC-subsidized buffet. The food is real. The pricing is a mirage. Enjoy it — seriously — but don't build your entire workflow around a rate that exists because investors believe in a cost curve.

If you're on Copilot, you just learned what "sustainable pricing" looks like: less access, more money.

Either way, stress-test this: could you afford your AI coding tool at $60–100/month? If the answer makes you flinch, you're not a customer — you're a growth metric. And growth metrics eventually get repriced.

The split

The AI coding market forked. Cursor is raising $2 billion at a $50 billion valuation to bet flat-rate survives. GitHub says it doesn't and is already retreating.

One of them is wrong. Within twelve months, your subscription price will tell you which.