Agnes 3.0 Flash vs Claude Opus 4.8
Wins 2 of 5 areas
Agents · Long documents
Wins 3 of 5 areas
Coding · Reasoning · Facts
Claude Opus 4.8 is the stronger all-rounder.Agnes 3.0 Flash is better at agents.
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.
- ReasoningHard problems that need careful thinking02Claude Opus 4.82 of 3 tests · 1 tie
- CodingWriting and fixing software02Claude Opus 4.82 of 2 tests
- FactsGetting facts right instead of making them up02Claude Opus 4.82 of 2 tests
- AgentsCarrying out multi-step tasks on its own21Agnes 3.0 Flash2 of 3 tests
- Long documentsFinding answers in very long texts10Agnes 3.0 Flash1 of 1 test
Long documents rests on a single test.
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 three tests each model wins by the widest margin. Scores are out of 100.
Where Claude Opus 4.8 pulls ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+23.3points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+14.6points ahead
- Very hard expert questions across many subjectsHumanity's Last Exam+10.2points ahead
Where Agnes 3.0 Flash pulls ahead
- Customer-service tasks in a simulated bankτ-Bench V3 · Banking+13.4points ahead
- Real work tasks from 44 professionsGDPVal+4.7points ahead
- Reasons across sets of long documentsAA-LCR+3.3points ahead
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.
CodingClaude Opus 4.8
- SciCodeClaude Opus 4.8 by 2.851.654.4+2.8
- Terminal-Bench 2.1Claude Opus 4.8 by 2.68284.6+2.6
AgentsAgnes 3.0 Flash
- Terminal-Bench 4.0Claude Opus 4.8 by 14.67.121.7+14.6
- τ-Bench V3 · BankingAgnes 3.0 Flash by 13.447.634.2+13.4
- GDPValAgnes 3.0 Flash by 4.752.547.8+4.7
ReasoningClaude Opus 4.8
- Humanity's Last ExamClaude Opus 4.8 by 10.238.548.7+10.2
- CritPtClaude Opus 4.8 by 5.815.120.9+5.8
- GPQA Diamondtie92.492tie
FactsClaude Opus 4.8
- AA-Omniscience · AccuracyClaude Opus 4.8 by 23.325.548.8+23.3
- AA-Omniscience · Non-hallucinationClaude Opus 4.8 by 9.151.660.7+9.1
Other results2 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 Opus 4.8 by 39.4-10.628.8+39.4
- AA IntelligenceClaude Opus 4.8 by 6.335.541.8+6.3
Questions people ask
Which is better, Agnes 3.0 Flash or Claude Opus 4.8?
Claude Opus 4.8 wins three of the five areas where both have results: coding, reasoning and facts. Agnes 3.0 Flash wins agents and long documents.
Which is better for coding?
Claude Opus 4.8. It wins 2 of the 2 coding tests both models report; Agnes 3.0 Flash wins none.
How do you compare the two?
We use the 13 benchmark tests both models have published scores on. The verdict counts the 11 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 2 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.