comparison
Claude Haiku 4.5 vs Gemini 2.5 Flash
Token pricing, context window and real monthly cost, side by side. Gemini 2.5 Flash is the cheaper of the two for a typical workload — about 2.4× less.
Positioned by published specs — size, context and modality — not measured performance; a smaller model can sometimes outperform a larger one on your task.
By size & context, Gemini 2.5 Flash (Mid) sits above Claude Haiku 4.5 (Mini) yet costs less. On spec it's the straightforward pick; choose Claude Haiku 4.5 only for something it offers that Gemini 2.5 Flash doesn't — modality, provider or ecosystem.
| metric | Claude Haiku 4.5 | Gemini 2.5 Flash |
|---|---|---|
| Input / 1M | $1.00 | $0.30 |
| Output / 1M | $5.00 | $2.50 |
| Context | 200K | 1.0M |
| Technical class | Mini | Mid |
| Cost @ typical workload | $800/mo | $340/mo |
| Modality | text + image | text + image + audio + video |
| Price source | list | list |
| Provider | Anthropic |
Snapshot . Cost uses a typical workload; tune it in the calculator. How we measure →
Which should you pick?
On a typical workload, Gemini 2.5 Flash costs $340/mo against Claude Haiku 4.5's $800/mo — roughly 2.4× cheaper. But the ranking depends on your output-to-input ratio: output is the pricier direction for both, so an output-heavy job (code generation, long answers) widens the gap while an input-heavy one (summarization, retrieval) narrows it. If you need to fit more in a single prompt, Gemini 2.5 Flash has the larger 1.0M-token window (~1,573 pages). By technical class (size and context, not measured capability), Gemini 2.5 Flash is the larger class (Mid) and the cheaper of the two — on spec, the stronger pick here.
These are list and routed market prices, not measured outcomes. Two models at the same rate can still cost different amounts to finish the same task, because verbose or reasoning-heavy models emit more tokens. That gap is exactly what measured cost-per-task captures. The technical-class read above is likewise spec-based — size, context and modality, not measured performance — so a smaller model can still outperform a larger one on your specific task.
Frequently asked questions
Is Claude Haiku 4.5 or Gemini 2.5 Flash cheaper?
For a typical workload (1,500 input + 500 output tokens × 200,000 requests/month), Gemini 2.5 Flash costs $340/mo versus $800/mo for Claude Haiku 4.5 — about 2.4× less. Because output is priced higher than input, the winner can flip if your workload writes much more or less than this; check your own numbers in the calculator.
What's the main difference between Claude Haiku 4.5 and Gemini 2.5 Flash?
On price, Claude Haiku 4.5 is $1.00/$5.00 per 1M (in/out) and Gemini 2.5 Flash is $0.30/$2.50. By technical class (size & context) it's Mini (Claude Haiku 4.5) versus Mid (Gemini 2.5 Flash). Gemini 2.5 Flash has the larger context window at 1.0M tokens.
Which handles longer prompts, Claude Haiku 4.5 or Gemini 2.5 Flash?
Gemini 2.5 Flash — its 1.0M-token context window (~1,573 pages of text) is the larger of the two, by roughly 5×.
More comparisons
- GPT-5.4 vs Claude Haiku 4.5
- Claude Haiku 4.5 vs GPT-5.4 mini
- GPT-5.4 mini vs Gemini 2.5 Flash
- Claude Haiku 4.5 vs GPT-5.4 nano
- Gemini 2.5 Flash vs GPT-5.4 nano
- Claude Fable 5 vs Claude Haiku 4.5
Related
- Claude Haiku 4.5 and Gemini 2.5 Flash — full specs and price history.
- API cost calculator — compare on your own workload.
- All comparisons — the full head-to-head index.