Celeris-1 vs Claude Haiku 4.5
Wins 0 of 5 areas
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Wins 5 of 5 areas
Coding · Agents · Reasoning · Facts · Long documents
Claude Haiku 4.5 is the stronger all-rounder.Celeris-1 is cheaper.
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.
- AgentsCarrying out multi-step tasks on its own02Claude Haiku 4.52 of 3 tests · 1 tie
- ReasoningHard problems that need careful thinking02Claude Haiku 4.52 of 3 tests · 1 tie
- CodingWriting and fixing software02Claude Haiku 4.52 of 2 tests
- FactsGetting facts right instead of making them up02Claude Haiku 4.52 of 2 tests
- Long documentsFinding answers in very long texts01Claude Haiku 4.51 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.
Celeris-1 costs 85% 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 Claude Haiku 4.5 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+65.5points ahead
- Reasons across sets of long documentsAA-LCR+36.3points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+33points ahead
Where Celeris-1 pulls ahead
No clear win on a test scored out of 100.
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 Haiku 4.5
- Terminal-Bench 2.1Claude Haiku 4.5 by 3311.244.2+33
- SciCodeClaude Haiku 4.5 by 20.621.642.2+20.6
AgentsClaude Haiku 4.5
- GDPValClaude Haiku 4.5 by 11.8011.8+11.8
- τ-Bench V3 · BankingClaude Haiku 4.5 by 5.43.99.3+5.4
- Terminal-Bench 4.0tie00tie
ReasoningClaude Haiku 4.5
- GPQA DiamondClaude Haiku 4.5 by 4.163.167.2+4.1
- Humanity's Last ExamClaude Haiku 4.5 by 3.66.810.4+3.6
- CritPttie00tie
FactsClaude Haiku 4.5
- AA-Omniscience · Non-hallucinationClaude Haiku 4.5 by 65.57.272.7+65.5
- AA-Omniscience · AccuracyClaude Haiku 4.5 by 71118+7
Other results3 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 Haiku 4.5 by 67.2-71.6-4.4+67.2
- Artificial Analysis Coding IndexClaude Haiku 4.5 by 29.514.443.9+29.5
- AA IntelligenceClaude Haiku 4.5 by 10.66.316.9+10.6
Questions people ask
Which is better, Celeris-1 or Claude Haiku 4.5?
Claude Haiku 4.5 wins all five areas where both have results: coding, agents, reasoning, facts and long documents. Celeris-1 wins none, but costs 85% less.
Which is better for coding?
Claude Haiku 4.5. It wins 2 of the 2 coding tests both models report; Celeris-1 wins none.
Which is cheaper?
Celeris-1 costs $0.20 per million input tokens and $0.70 per million output tokens; Claude Haiku 4.5 costs $1.00 and $5.00. That makes Celeris-1 about 85% cheaper for the same work.
How do you compare the two?
We use the 14 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 3 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.