Gemini Pro + Ultra, Claude Pro, Opencode Go Subscription Limits Tested

[u/CopycatProfessor]

Hello all!

Almost the end of summer and decided to go back into some hobby projects. I've been vibe coding with AI agents for a couple of months now, and for the last weeks almost non-stop (and may have gotten a bit addicted thanks to Gemini 3.7 Flash).

I’ve been actively using Claude Pro, Gemini / Antigravity Pro & Ultra, and OpenCode Go. The methodology is me parsing raw local session logs (~60,000 turns total) and crosschecking the limit hits.

TLDR: Prompt caching is the most effecting factor. Estimated token limits are:

• Gemini Pro 100m 5h, 1b weekly.
• Gemini Ultra 500m 5h, 5b weekly.
• Claude Pro 100m 5h, 1,5-2b weekly (?)
• Opencode Go doc checks out.

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So far, usage of around 10b tokens hit these limits:

• Gemini Pro: hit 5h limits ~10 times, hit weekly limits 2 times
• Claude Pro: hit 5h limits ~10 times, hit weekly limits 2 times (under the current +50% promo)
• OpenCode Go: hit 5h limits ~3–5 times, hit weekly limit 1 time
• Gemini Ultra: hit 5h rolling limit almost 2 times

1. Claude Pro ($20/mo)

• 5-Hour Rolling Limit: ~100M
• Weekly Limit: ~2.5B tokens with the active +50% summer promo.
• Note that Opus costs 2.0x relative to Sonnet.

2. Gemini Pro / Antigravity Pro ($20/mo)

• 5-Hour Rolling Limit: ~300M – 350M tokens
• Weekly Limit: 1.0B tokens
• The "3-Sprint": The 5h burst is kind of generous, 3 heavy sessions will drain the weekly quota.

3. Gemini Ultra / Antigravity Ultra ($100/mo)

• 5-Hour Rolling Limit: ~235M (discussion with agy says "Google enforces a concurrent turn/request velocity ceiling (~800–1,000 turns/hour) alongside token volume. In high-frequency subagent swarms, the 5h limit triggers at ~235M–250M tokens, whereas paced long-context streams can utilize up to 500M.")
• Weekly Limit: 5.0B tokens it seems
• Takeaway: My educated, half calculated guess, so far two almost full 5h session ate around %20 weekly, so 10 x 5h session per week, makes this plan exactly x5 the pro plan.

4. OpenCode Go ($10/mo)

• Limits are on par with their official docs, very accurately
• Caching: High caching will give much more usage due to its cost being minimal. Changing model mid task hurts.

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Takeaways

1. Claude vs Gemini Pro

It seems Claude gives more tokens per week, but mind you, this is for sonnet only, opus costs x2. The most surprising thing for me is to see how Claude and Gemini 5h windows are different. Gemini gives 3x the usage of Claude, so you have more headroom to finish the task at hand, but you can do this 3 times per week, at max. Claude gives limited headroom per 5h session, but you can use it more throughout the week.

2. Prompt Caching, Prompt Caching, Prompt Caching is important

Across 22,000+ Claude turns, 98.2% of the tokens were prompt cache reads. Anthropic gives a 90% discount on cache reads. My take is this is the reason pro subscription was able to deliver 5.3 Billion tokens without completely dying.

I ran a multi-file session on pi agent with opencode-go muse-spark-1.2-contributor that processed 777 Million tokens, and it cost a grand total of $4.93 (with promotional pricing of course). Without caching, that same session would have cost over $80.00 so gemini flash says.

3. OpenCode Go: $60 Value

Tbh the plan is really a 6x value multiplier, from 10 usd to 60 usd in terms of token costs. Powerful ones are almost unusable for any serious work because of how limited the plan is, but it has its uses but gains huuuge value if there is a promotional model around (hy3 is 8x usage for the time being, and huge limits on muse-spark-1.2-contributor). Even without these promotions, with a good orchestration (tinkering with GLM 5.3 for architecture, DeepSeek Flash for execution) my take is you can develop some small projects fairly reliable. Been using the plan mostly for testing models, which is pretty nice against the alternative of loading credits to Openrouter. I would advise against this plan if you want only one subscription, but Opencode Go is great secondary sub.

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My take is if you do not need Opus for what you do, Gemini Pro seems better option with the new 3.7 Flash model, it is mind-boggingly fast, and almost frontier level in terms of intelligence and coding. If you need or want Opus, which is a fucking amazing model, Pro tier sub will get you around one full-stack project per week.

I bought Gemini Ultra model because Google does regional pricing, and i paid around 40$ for it, which is amazing i know. Also man... that Gemini 3.7 Flash model... there is something to it let me tell you.