AI in practice
Matthias Bastian

Gemini Flash 2.5 becomes 150 times more expensive for reasoning tasks than Flash 2.0

Matthias is the co-founder and publisher of THE DECODER, exploring how AI is fundamentally changing the relationship between humans and computers.
Profile
E-Mail

Reasoning tasks sharply raise AI costs, according to a new analysis by Artificial Analysis. Google's Gemini Flash 2.5 costs 150 times more to run than Flash 2.0, due to using 17 times more tokens and charging $3.50 per million output tokens with reasoning, compared to $0.40 for the earlier model. This makes Flash 2.5 the most expensive model in terms of token use for logic. OpenAI's o4-mini costs more per token but used fewer tokens overall, making it cheaper in the benchmark.

Ad
Bar chart titled “Cost to Run Artificial Analysis Intelligence Index.” It shows total U.S. dollar costs to complete all tests in the Artificial Analysis Intelligence Index using different AI models. Bars are split into three colors: Input (blue), Reasoning (purple), Output (green). On the left are the most expensive models: GPT-3 ($1,951), Claude 3 Opus ($1,485), Gemini 2.5 Pro ($844). In the middle: Gemini 2.5 Flash with reasoning ($445), o4-mini (high) ($323). On the right are the cheapest models: Gemini 2.0 Flash ($3), Llama 3 8B ($2). A purple arrow above highlights the cost gap between Gemini 2.0 Flash and Gemini 2.5 Flash with reasoning, labeled “150x.” Source: Artificial Analysis.
Google's Gemini Flash 2.5 costs 150 times more to run with reasoning enabled than Flash 2.0, due to higher token use and pricing. | Image: Artificial Analysis
Support our independent, free-access reporting. Any contribution helps and secures our future. Support now:
Bank transfer
Sources
Artificial Analysis via X
Matthias is the co-founder and publisher of THE DECODER, exploring how AI is fundamentally changing the relationship between humans and computers.
Profile
E-Mail
AI in practice

Deepseek's R1 model closes the gap with OpenAI and Google after major update

News, tests and reports about VR, AR and MIXED Reality.
Meta and Anduril are now jointly developing XR headsets for the US military An unofficial VR port of Counter-Strike 1.6 is coming to Meta Quest Teenage Mutant Ninja Turtles are getting their own VR game MIXED-NEWS.com
AI in practice

Black Forest Labs' FLUX.1 merges text-to-image generation with image editing in one model

AI in practice

Perplexity's new Labs feature signals its shift toward being more like ChatGPT

Google News
Join our community
Join the DECODER community on Discord, Reddit or Twitter - we can't wait to meet you.
Join our community
Join the DECODER community on Discord, Reddit or Twitter - we can't wait to meet you.

Gemini Flash 2.5 becomes 150 times more expensive for reasoning tasks than Flash 2.0

Bank details

IBAN: DE87 1203 0000 1086 0070 75
Account holder: DEEP CONTENT GbR
Purpose: Support THE DECODER
AI research

Wait a minute! Researchers say AI's "chains of thought" are not signs of human-like reasoning

AI in practice

Anthropic releases Claude 4 with new safety measures targeting CBRN misuse

AI in practice

OpenAI launches Codex: Autonomous AI agents for software development

Google News