Google: Gemini 2.5 Flash vs Moondream: Moondream 3 Preview
Neither wins outright: Google: Gemini 2.5 Flash is the pick when you need to fit long inputs in one request, Moondream: Moondream 3 Preview when you want the newer model.
Monthly cost at list price for five common workloads. Token counts per unit are stated so you can scale them to your own traffic. A workload that does not fit a model's context window is marked rather than priced.
Workload (per month)
Google: Gemini 2.5 Flash
Moondream: Moondream 3 Preview
Difference
Customer-support chatbot
50,000 conversations — each a 6-turn conversation (1,500 in / 400 out tokens)
$72.50
$72.50
—
RAG search over documents
20,000 questions — each a question answered from ~8 retrieved passages (6,000 in / 500 out tokens)
$61.00
$61.00
—
Coding / tool-using agent
2,000 tasks — each a multi-step task with tool calls and file context (60,000 in / 6,000 out tokens)
$66.00
Doesn't fit context
—
Batch summarisation
10,000 documents — each a 6,000-word report summarised to a page (8,000 in / 600 out tokens)
$39.00
$39.00
—
Long-document analysis
500 documents — each a 150-page contract or codebase read in one pass (100,000 in / 2,000 out tokens)
$17.50
Doesn't fit context
—
Capabilities side by side
Capability
Google: Gemini 2.5 Flash
Moondream: Moondream 3 Preview
What it lets you do
Tool / function calling
✓ Yes
—
call your APIs and run agent loops
Structured output (JSON schema)
✓ Yes
—
return JSON that validates against your schema
Reasoning / thinking mode
✓ Yes
✓ Yes
spend extra tokens thinking before answering hard problems
Image input
✓ Yes
✓ Yes
read screenshots, charts and scanned pages
Audio input
✓ Yes
—
take speech or audio directly
File / PDF input
✓ Yes
—
accept documents without your own parsing step
Image output
—
—
generate images, not just text
Built-in web search
✓ Yes
—
answer from live web results
Seed (reproducible sampling)
✓ Yes
—
repeat a generation for tests and evals
Log-probabilities
—
—
read token confidence for classification and scoring
From each model's published parameters and input/output types. “—” means not advertised, not proven absent.
Price history
Google: Gemini 2.5 Flash: price unchanged since we started tracking it on 2026-03-10.
Moondream: Moondream 3 Preview: price unchanged since we started tracking it on 2026-10-16.
Which should you choose?
Choose Google: Gemini 2.5 Flash if…
you need to fit long inputs in one request — 1.0M tokens is roughly 1,573 pages, against 48
you need tool / function calling — to call your APIs and run agent loops; Moondream: Moondream 3 Preview does not advertise it
you need structured output (JSON schema) — to return JSON that validates against your schema; Moondream: Moondream 3 Preview does not advertise it
you need audio input — to take speech or audio directly; Moondream: Moondream 3 Preview does not advertise it
you need file / PDF input — to accept documents without your own parsing step; Moondream: Moondream 3 Preview does not advertise it
you need built-in web search — to answer from live web results; Moondream: Moondream 3 Preview does not advertise it
you need seed (reproducible sampling) — to repeat a generation for tests and evals; Moondream: Moondream 3 Preview does not advertise it
you generate long outputs in one go — up to 66K tokens (about 49,200 words) per response
Choose Moondream: Moondream 3 Preview if…
you want the newer model — released 2026-10-15, 16 months after the other
Frequently asked questions
Is Google: Gemini 2.5 Flash better than Moondream: Moondream 3 Preview?
Neither wins outright: Google: Gemini 2.5 Flash is the pick when you need to fit long inputs in one request, Moondream: Moondream 3 Preview when you want the newer model. In short: Google: Gemini 2.5 Flash when you need to fit long inputs in one request, you need tool / function calling, you need structured output (JSON schema), you need audio input, you need file / PDF input, you need built-in web search, you need seed (reproducible sampling), you generate long outputs in one go; Moondream: Moondream 3 Preview when you want the newer model.
Which is cheaper, Google: Gemini 2.5 Flash or Moondream: Moondream 3 Preview?
They cost the same: $0.85 per 1M tokens at a 3:1 input/output mix.
How much do Google: Gemini 2.5 Flash and Moondream: Moondream 3 Preview cost per million tokens?
Google: Gemini 2.5 Flash costs $0.30 per 1M input tokens and $2.50 per 1M output tokens; Moondream: Moondream 3 Preview costs $0.30 input and $2.50 output. Output tokens are billed separately, so long answers shift the gap.
Which has the bigger context window, Google: Gemini 2.5 Flash or Moondream: Moondream 3 Preview?
Google: Gemini 2.5 Flash: 1.0M tokens, about 1,573 pages, against 32K (about 48 pages) for Moondream: Moondream 3 Preview.
Do Google: Gemini 2.5 Flash and Moondream: Moondream 3 Preview support function calling and JSON output?
Gemini 2.5 Flash is Google's state-of-the-art workhorse model, specifically designed for advanced reasoning, coding, mathematics, and scientific tasks. It includes built-in "thinking" capabilities, enabling it to provide responses with greater...
Moondream 3 Preview is a vision-language model from Moondream with 9B total parameters and 2B active (mixture-of-experts). It handles visual question answering, captioning, OCR, and visual reasoning over images, with...