Cost and performance comparison
Gemini 2.0 Flash vs Gemini 3.1 Flash-Lite
Model AGoogle
Gemini 2.0 Flash
- Cost / 1M Tokens
- $0.19
- 70% in · 30% out mix
- Value Index (score÷cost)
- 444.1
- Higher = better value
- Speed
- 99/100
- Context
- 1.0M
- Tier
- Fast Tier
Last list price before the model was retired.
Model BGoogle
Gemini 3.1 Flash-Lite
- Cost / 1M Tokens
- $0.63
- 70% in · 30% out mix
- Value Index (score÷cost)
- 133.6
- Higher = better value
- Speed
- 98/100
- Context
- 1.0M
- Tier
- Fast Tier
List price from the Google pricing page, verified October 12, 2026.
Check the sourceIn-depth analysis
Gemini 2.0 Flash vs Gemini 3.1 Flash-Lite: Detailed Comparison
Gemini 2.0 Flash is Google's lightweight-tier language model with a 1.0M-token context window, excelling at data extraction. Gemini 3.1 Flash-Lite from Google is a lightweight-tier model supporting 1.0M tokens in context, with standout performance in data extraction.
Gemini 3.1 Flash-Lite costs 3.3x what Gemini 2.0 Flash does for the same text. That is a steep premium, and it buys a 2-point lead on combined coding and reasoning. Whether that trade is worth it depends entirely on how much of your traffic actually needs the harder model — for most workloads the honest answer is a small fraction of it, which is an argument for routing rather than for picking one. Gemini 2.0 Flash is priced at $0.10/M input tokens and $0.40/M output tokens. Gemini 3.1 Flash-Lite costs $0.25/M input and $1.50/M output.
On iOPTERA's editorial scores, Gemini 3.1 Flash-Lite leads with 80/100 for coding and 81/100 for reasoning, against Gemini 2.0 Flash's 78/100 and 81/100.
Capability breakdown
Across the five core benchmark categories, here is how Gemini 2.0 Flash and Gemini 3.1 Flash-Lite stack up head to head:
Best model by task
- coding: Gemini 3.1 Flash-Lite wins with 80/100
- data extraction: Gemini 2.0 Flash wins with 92/100
- creative tasks: Gemini 2.0 Flash wins with 80/100
- vision/multimodal: Gemini 2.0 Flash wins with 88/100
Estimated monthly cost at scale
For 10M + 2M tokens of text a month (counted the way OpenAI's tokenizer counts), Gemini 2.0 Flash runs about $1.73 while Gemini 3.1 Flash-Lite runs about $5.34 — Gemini 2.0 Flash saves roughly $3.61 (68%) every month.
What actually decides it
Both models come from Google, so they share a tokenizer, an API surface, and a billing account. Switching between them is a model-string change and nothing else — no new SDK, no re-tokenizing your prompts to re-estimate cost, no second vendor to onboard. That makes routing between them far cheaper to implement than a cross-vendor split.
These are the same lab's model at the same tier, 15 months apart — so this is an upgrade question, not a choice between alternatives. Gemini 3.1 Flash-Lite is the current entry; Gemini 2.0 Flash is here because plenty of production traffic still runs on it. If you are starting something new there is little reason to pick the older one, and if you are already on it the question is whether the migration cost is worth the gain.
Context is effectively a tie: 1.0M against 1.0M. Neither model unlocks a document size the other cannot handle, so this axis should not enter the decision. If you were hoping context would break the tie for you, it will not.
Throughput is close enough to ignore — 99/100 versus 98/100. Neither model will feel noticeably quicker in an interactive product, so latency is not a reason to choose between them.
One practical asymmetry: Gemini 3.1 Flash-Lite offers a batch API at 50% off standard rates, and Gemini 2.0 Flash does not. For anything that does not need an answer immediately — nightly enrichment, backfills, evaluation runs — that discount can be worth more than the difference in list price, and it is easy to overlook when comparing headline rates.
Gemini 3.1 Flash-Lite is 3.3x the price of Gemini 2.0 Flash. Reserve it for the requests that actually need it and route the rest to Gemini 2.0 Flash — that hybrid beats either model used alone on cost per useful answer.
What you actually pay
The list price is only the start. Prompt caching, batch processing and long prompts change the bill, and each provider sets them differently. Prices per 1M tokens.
| Pricing term | Gemini 2.0 Flash | Gemini 3.1 Flash-Lite |
|---|---|---|
| List price (input / output) | $0.10 / $0.40 | $0.25 / $1.50 |
| Cached input | — | $0.02510% of the input price |
| Batch API | — | 50% off input and output |
| Long prompts | — | No surcharge across the 1.05M window |
| Input with 80% cache hits | — | $0.07 |
The last row assumes 80% of input tokens are read from the cache, as in a chat app that re-sends a long system prompt or RAG over the same documents. Cache-write and storage charges are not included.
Gemini also bills cache storage by the hour.
Checked on October 8, 2026 against the pricing pages of Google.
Capability scores
iOPTERA editorial scores across 5 categories — informed by public benchmarks, not measured by us
Coding
Reasoning
Extraction
Creative
Vision
Speed Score
Context Window
What Is a Token?
Models don't read words — they process tokens.
A token is roughly 4 characters of English text (~¾ of a word). Your API bill is priced per million tokens — understanding this directly reduces your costs.
Short phrase
"Hello, world!"
- Gemini 2.0 Flash
- $0.04
- Gemini 3.1 Flash-Lite
- $0.10
Business email
One typical email (~200 words)
- Gemini 2.0 Flash
- $2.59
- Gemini 3.1 Flash-Lite
- $6.55
Code file
50-line Python script
- Gemini 2.0 Flash
- $3.84
- Gemini 3.1 Flash-Lite
- $9.70
Prices shown are for 100,000 runs of each workload — one run costs a fraction of a cent on both Gemini 2.0 Flash and Gemini 3.1 Flash-Lite, so the number only becomes meaningful at production volume. Input tokens only; add your output volume in the calculator below.
How to check your token usage
response.usage.total_tokensEvery API response includes a usage object. Sum total_tokens across all calls to get your monthly figure, then use the calculator below.
Your Cost Calculator
Enter your actual monthly token usage to see real savings
Quick Presets
Gemini 2.0 Flash
$5.47/mo
$65.66/yr
Gemini 3.1 Flash-Lite
$18.19/mo
$218.25/yr
Annual Savings
$152.59 saved per year
Gemini 2.0 Flash cheaper · $12.72/mo
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