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Gemini 2.5 Flash vs GPT-5 Mini

Google DeepMind vs OpenAI. Specs, benchmarks, and real per-task cost — all in one page.

Verdict

Gemini 2.5 Flash leads on LMSYS ELO (1312 vs 1288). Gemini 2.5 Flash is ~1.7× cheaper on a 3:1 input:output blend.

Google DeepMind

Google’s price/performance darling. 1M context at $0.30/M input — nobody comes close on throughput-per-dollar.

Absurd cost-to-context ratioFast multimodalFree tier via AI Studio

OpenAI

GPT-5’s smaller, cheaper sibling. Optimized for chat and lightweight agent tasks.

Very low latencyCheap enough for mass consumer apps

Pricing

Input / 1M$0.30$0.50

Output / 1M$1.20$2.00

Context1.0M256K

Max output32K16K

LicenseProprietaryProprietary

Released2026-02-052026-01-21

Benchmarks

LMSYS ELO1312.01288.0

MMLU Pro82.178.5

HumanEval85.885.5

MATH84.279.8

MMMU74.6—

IFEval86.185.4

Per-task cost

Summarize a 1-hour meeting transcript$0.0051$0.0085

Review a 500-line pull request$0.0048$0.0080

Answer a customer support ticket$0.0019$0.0031

Extract structured data from a resume$0.0027$0.0045

Debug a stack trace with context$0.0042$0.0070

Per-call cost using published token counts for each task. Real-world prompts vary.

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