Claude 3.5 Haiku vs Reka Flash 3
Wins 4 of 5 areas
Coding · Facts · Long documents · Following instructions
Wins 1 of 5 areas
Reasoning
Claude 3.5 Haiku is the stronger all-rounder.Reka Flash 3 is better at reasoning.
Scores updated · 14 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.
- CodingWriting and fixing software10Claude 3.5 Haiku1 of 2 tests · 1 tie
- FactsGetting facts right instead of making them up10Claude 3.5 Haiku1 of 2 tests · 1 tie
- Long documentsFinding answers in very long texts10Claude 3.5 Haiku1 of 1 test
- Following instructionsDoing exactly what it is asked10Claude 3.5 Haiku1 of 1 test
- ReasoningHard problems that need careful thinking01Reka Flash 31 of 3 tests · 2 ties
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.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Claude 3.5 Haiku pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+50.2points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+12.4points ahead
Where Reka Flash 3 pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+12.1points ahead
Every test, side by side
All 14 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude 3.5 Haiku
- Terminal-Bench HardClaude 3.5 Haiku by 2.32.30+2.3
- SciCodetie27.426.7tie
ReasoningReka Flash 3
- GPQA DiamondReka Flash 3 by 12.140.852.9+12.1
- Humanity's Last Examtie3.64.4tie
- CritPttie00tie
FactsClaude 3.5 Haiku
- AA-Omniscience · Non-hallucinationClaude 3.5 Haiku by 50.258.98.7+50.2
- AA-Omniscience · Accuracytie13.213.7tie
Following instructionsClaude 3.5 Haiku
- IFBenchClaude 3.5 Haiku by 12.442.830.4+12.4
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.
- AA-OmniscienceClaude 3.5 Haiku by 42.6-22.5-65.1+42.6
- τ²-Bench Telecom (AA run)Claude 3.5 Haiku by 24.624.60+24.6
- Artificial Analysis Coding IndexClaude 3.5 Haiku by 715.98.9+7
- AA IntelligenceClaude 3.5 Haiku by 3.38.95.6+3.3
- AA Agentic IndexClaude 3.5 Haiku by 1.91.90+1.9
Questions people ask
Which is better, Claude 3.5 Haiku or Reka Flash 3?
Claude 3.5 Haiku wins four of the five areas where both have results: coding, facts, long documents and following instructions. Reka Flash 3 wins reasoning.
Which is better for coding?
Claude 3.5 Haiku. It wins 1 of the 2 coding tests both models report; Reka Flash 3 wins none, and 1 is a tie.
How do you compare the two?
We use the 14 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 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.