Gemini 2.5 Flash Preview 05-20 vs Gemini 2.5 Flash Preview (thinking)

Compare Gemini 2.5 Flash Preview 05-20 and Gemini 2.5 Flash Preview (thinking), both from Google AI, context windows of 1.0M vs 1.0M, tested across 8 shared challenges. Updated April 2026.

Which is better, Gemini 2.5 Flash Preview 05-20 or Gemini 2.5 Flash Preview (thinking)?

Gemini 2.5 Flash Preview 05-20 and Gemini 2.5 Flash Preview (thinking) are both competitive models. Gemini 2.5 Flash Preview 05-20 costs $0.15/M input tokens vs $0.175/M for Gemini 2.5 Flash Preview (thinking). Context windows: 1049K vs 1049K tokens. Compare their real outputs side by side below.

Key Differences Between Gemini 2.5 Flash Preview 05-20 and Gemini 2.5 Flash Preview (thinking)

Gemini 2.5 Flash Preview 05-20 is made by google while Gemini 2.5 Flash Preview (thinking) is from google. Gemini 2.5 Flash Preview 05-20 has a 1049K token context window compared to Gemini 2.5 Flash Preview (thinking)'s 1049K. On pricing, Gemini 2.5 Flash Preview 05-20 costs $0.15/M input tokens vs $0.175/M for Gemini 2.5 Flash Preview (thinking).

Our Verdict
Gemini 2.5 Flash Preview 05-20
Gemini 2.5 Flash Preview 05-20
Gemini 2.5 Flash Preview (thinking)
Gemini 2.5 Flash Preview (thinking)

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Gemini 2.5 Flash Preview 05-20 is 5.8x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
95%

Gemini 2.5 Flash Preview (thinking) uses 24.3x more transitions

Gemini 2.5 Flash Preview 05-20
Gemini 2.5 Flash Preview (thinking)
69%Vocabulary53%
10wSentence Length14w
0.26Hedging0.38
1.1Bold4.4
5.5Lists4.1
0.00Emoji0.00
0.00Headings0.00
0.00Transitions0.24
Based on 2 + 7 text responses
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Gemini 2.5 Flash Preview 05-20Gemini 2.5 Flash Preview (thinking)

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