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Gemini 2.5 Flash vs Gemini 2.5 Flash (Sep) (Non-Reasoning)

Google · released

Wins 0 of 7 areas

—

Google · released

Wins 6 of 7 areas

Coding · Agents · Reasoning · Images and charts · Long documents · Following instructions

Gemini 2.5 Flash (Sep) (Non-Reasoning) is the stronger all-rounder.

Scores updated · 17 tests both models report · How we compare

Where each one wins

Tests won in each of the seven areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.

Agents, long documents and following instructions rest on a single test each.

What it costs

Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.

Gemini 2.5 Flash$0.30 to read · $2.50 to write$2.80Price from Artificial Analysis
Gemini 2.5 Flash (Sep) (Non-Reasoning)No current price is tracked.

The biggest differences

The tests each model wins by the widest margin, up to three each. Scores are out of 100.

Where Gemini 2.5 Flash (Sep) (Non-Reasoning) pulls ahead

  • Real work tasks from 44 professionsGDPVal+18.6points aheadGemini 2.5 Flash (Sep) (Non-Reasoning)28.5Gemini 2.5 Flash9.9
  • Code for real scientific research problemsSciCode+11.4points aheadGemini 2.5 Flash (Sep) (Non-Reasoning)40.5Gemini 2.5 Flash29.1
  • Reasons across sets of long documentsAA-LCR+5.7points aheadGemini 2.5 Flash (Sep) (Non-Reasoning)71Gemini 2.5 Flash65.3

Where Gemini 2.5 Flash pulls ahead

Every test, side by side

All 17 tests both models report. The winning score is in its model's colour; marks a score checked independently.

CodingGemini 2.5 Flash (Sep) (Non-Reasoning)
  • SciCodeGemini 2.5 Flash (Sep) (Non-Reasoning) by 11.429.140.5+11.4
  • Terminal-Bench HardGemini 2.5 Flash (Sep) (Non-Reasoning) by 3.113.616.7+3.1

Full coding ranking

AgentsGemini 2.5 Flash (Sep) (Non-Reasoning)
  • GDPValGemini 2.5 Flash (Sep) (Non-Reasoning) by 18.69.928.5+18.6

Full agents ranking

ReasoningGemini 2.5 Flash (Sep) (Non-Reasoning)

Full reasoning ranking

FactsEven

Full facts ranking

Images and chartsGemini 2.5 Flash (Sep) (Non-Reasoning)
  • MMMU-ProGemini 2.5 Flash (Sep) (Non-Reasoning) by 469.173.1+4
  • LMArena · VisionGemini 2.5 Flash (Sep) (Non-Reasoning) by 19 rating points12351254+19 rating

Full images and charts ranking

Long documentsGemini 2.5 Flash (Sep) (Non-Reasoning)
  • AA-LCRGemini 2.5 Flash (Sep) (Non-Reasoning) by 5.765.371+5.7

Full long documents ranking

Following instructionsGemini 2.5 Flash (Sep) (Non-Reasoning)
  • IFBenchGemini 2.5 Flash (Sep) (Non-Reasoning) by 250.352.3+2

Full following instructions ranking

Other results5 tests, not counted

Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.

Questions people ask

Which is better, Gemini 2.5 Flash or Gemini 2.5 Flash (Sep) (Non-Reasoning)?

Gemini 2.5 Flash (Sep) (Non-Reasoning) wins six of the seven areas where both have results: coding, agents, reasoning, images and charts, long documents and following instructions. Gemini 2.5 Flash wins none. They are level on facts.

Which is better for coding?

Gemini 2.5 Flash (Sep) (Non-Reasoning). It wins 2 of the 2 coding tests both models report; Gemini 2.5 Flash wins none.

How do you compare the two?

We use the 17 benchmark tests both models have published scores on. The verdict counts the 12 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 5 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.