Apertus 8B Instruct vs Reka Flash 3
Wins 0 of 5 areas
—
Wins 4 of 5 areas
Coding · Reasoning · Facts · Following instructions
Reka Flash 3 is the stronger all-rounder.Apertus 8B Instruct is cheaper.
Scores updated · 13 tests both models report · How we compare
Where each one wins
Tests won in each of the five 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.
- FactsGetting facts right instead of making them up02Reka Flash 32 of 2 tests
- ReasoningHard problems that need careful thinking01Reka Flash 31 of 3 tests · 2 ties
- CodingWriting and fixing software01Reka Flash 31 of 2 tests · 1 tie
- Following instructionsDoing exactly what it is asked01Reka Flash 31 of 1 test
- Long documentsFinding answers in very long texts00Even0 each · 1 tie
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.
Apertus 8B Instruct costs 70% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Reka Flash 3 pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+27.3points ahead
- Code for real scientific research problemsSciCode+22.6points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+8points ahead
Where Apertus 8B Instruct pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 13 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingReka Flash 3
- SciCodeReka Flash 3 by 22.64.126.7+22.6
- Terminal-Bench Hardtie00tie
ReasoningReka Flash 3
- GPQA DiamondReka Flash 3 by 27.325.652.9+27.3
- Humanity's Last Examtie54.4tie
- CritPttie00tie
FactsReka Flash 3
- AA-Omniscience · Non-hallucinationReka Flash 3 by 4.83.98.7+4.8
- AA-Omniscience · AccuracyReka Flash 3 by 49.713.7+4
Following instructionsReka Flash 3
- IFBenchReka Flash 3 by 822.430.4+8
Other results4 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.
- AA-OmniscienceReka Flash 3 by 12.1-77.2-65.1+12.1
- τ²-Bench Telecom (AA run)Apertus 8B Instruct by 11.411.40+11.4
- AA Agentic IndexApertus 8B Instruct by 3.83.80+3.8
- AA Intelligencetie4.85.6tie
Questions people ask
Which is better, Apertus 8B Instruct or Reka Flash 3?
Reka Flash 3 wins four of the five areas where both have results: coding, reasoning, facts and following instructions. Apertus 8B Instruct wins none, but costs 70% less. They are level on long documents.
Which is better for coding?
Reka Flash 3. It wins 1 of the 2 coding tests both models report; Apertus 8B Instruct wins none, and 1 is a tie.
Which is cheaper?
Apertus 8B Instruct costs $0.10 per million input tokens and $0.20 per million output tokens; Reka Flash 3 costs $0.20 and $0.80. That makes Apertus 8B Instruct about 70% cheaper for the same work.
How do you compare the two?
We use the 13 benchmark tests both models have published scores on. The verdict counts the 9 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 4 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.