API cost decision in 10 seconds

Gemini 3.1 Flash Lite vs 🔥GPT-5.4

Pick Gemini 3.1 Flash Lite for lower cost; pick GPT-5.4 only if the larger context window matters more.

Pricing data updated:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Gemini 3.1 Flash Lite for lower cost; pick GPT-5.4 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Gemini 3.1 Flash Lite is estimated at $1 vs $10 for GPT-5.4, saving $9 (90% lower).

Cost-first pickGemini 3.1 Flash Lite
Context-first pickGPT-5.4
Sample savings$990%
10x traffic gap$90

GPT-5.4 has more context, but Gemini 3.1 Flash Lite saves $9 on the standard workload. At 10x that traffic, the same price gap is about $90. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Gemini 3.1 Flash Lite stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickGemini 3.1 Flash LiteGPT-5.4
Input-heavy / RAG 5M input + 500K output Gemini 3.1 Flash Lite $2 $20
Balanced workload 1M input + 1M output Gemini 3.1 Flash Lite $1.75 $17.5
Output-heavy chatbot 1M input + 5M output Gemini 3.1 Flash Lite $7.75 $77.5
Cheaper inputGemini 3.1 Flash Lite$0.25 vs $2.5 / 1M
Cheaper outputGemini 3.1 Flash Lite$1.5 vs $15 / 1M
Larger contextGPT-5.41.05M vs 1.05M
Sample workloadGemini 3.1 Flash Lite$1 vs $10

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Gemini 3.1 Flash LiteCalculating…Estimated API cost
GPT-5.4Calculating…Estimated API cost
Cheaper for this workloadCalculating…Difference: calculating…

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Quick Decision

Verdict

Gemini 3.1 Flash Lite has the lower input price, Gemini 3.1 Flash Lite has the lower output price, and GPT-5.4 offers the larger context window.

For a 1M input token plus 500K output token workload, the estimated API cost is $1 for Gemini 3.1 Flash Lite and $10 for GPT-5.4.

Best Fit

Choose Gemini 3.1 Flash Lite when you care most about lower input-token price, and lower output-token price.

Choose GPT-5.4 when you care most about larger context window.

Head-to-Head Specs
FeatureGemini 3.1 Flash Lite
(Google)		🔥GPT-5.4
(OpenAI)
Input Price
prompt tokens per 1M		$0.25$2.5
Completion Price
per 1M tokens		$1.5$15
Sample Workload Cost
1M input + 500K output		$1$10
Context Window1.05M1.05M
Release Date2026-05-072026-03-05
Popularity#19
Gemini 3.1 Flash Lite

Gemini 3.1 Flash Lite is Google’s GA high-efficiency multimodal model optimized for low-latency, high-volume workloads. It supports text, image, video, audio, and PDF inputs, and is designed for lightweight agentic...

GPT-5.4

GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for...

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionGemini 3.1 Flash LiteOn the standard 1M input plus 500K output workload, Gemini 3.1 Flash Lite is estimated at $1 vs $10 for GPT-5.4, saving $9 (90% lower).
High-volume input processingGemini 3.1 Flash LiteLower prompt-token price matters most when prompts or retrieved passages dominate the bill.
Long responses and chatbotsGemini 3.1 Flash LiteLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workGPT-5.4A larger context window leaves more room for retrieved passages and source files.