Model comparison
Celeris-1 vs Claude Sonnet 4.5
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Celeris-1 unranked (Not scored); Claude Sonnet 4.5 #96 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Celeris-1 and Claude Sonnet 4.5 share 0 comparable benchmark results. 1 of 8 categories are comparable. 1 result is unique to Celeris-1; 12 to Claude Sonnet 4.5.
Updated July 24, 2026- Shared results
- 0
- Celeris-1 only
- 1
- Claude Sonnet 4.5 only
- 12
- Comparable categories
- 1 / 8
Treat this as a split decision. Celeris-1 makes more sense if you want the cheaper token bill; Claude Sonnet 4.5 is the better fit if knowledge is the priority or you need the larger 200K context window.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Celeris-1 and Claude Sonnet 4.5 finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
Claude Sonnet 4.5 is also the more expensive model on tokens at $3.00 input / $15.00 output per 1M tokens, versus $2.00 input / $6.00 output per 1M tokens for Celeris-1. That is roughly 2.5x on output cost alone. Claude Sonnet 4.5 gives you the larger context window at 200K, compared with 8K for Celeris-1.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Celeris-1 | Claude Sonnet 4.5 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Celeris-1$2 input / $6 output | Claude Sonnet 4.5$3 input / $15 output | Celeris-1 has the lower combined listed price. |
| Generation speedtokens per second | Celeris-1Not available | Claude Sonnet 4.5Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Celeris-1Not available | Claude Sonnet 4.5Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Celeris-18K | Claude Sonnet 4.5200K | Claude Sonnet 4.5 lists the larger context window. |
Benchmark Deep Dive
Agentic5 benchmarks
Coding1 benchmarks
| Benchmark | Celeris-1 | Claude Sonnet 4.5 | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | — | 77.2% | Not comparable |
Reasoning1 benchmarks
| Benchmark | Celeris-1 | Claude Sonnet 4.5 | Result |
|---|---|---|---|
| ARC-AGI-2Source | — | 13.6% | Not comparable |
KnowledgeClaude Sonnet 4.5 wins2 benchmarks
Math3 benchmarks
Multimodal1 benchmarks
| Benchmark | Celeris-1 | Claude Sonnet 4.5 | Result |
|---|---|---|---|
| Design Arena WebsiteSource | — | 1219 | Not comparable |
Frequently Asked Questions (2)
Which is better, Celeris-1 or Claude Sonnet 4.5?
Celeris-1 and Claude Sonnet 4.5 are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for knowledge tasks, Celeris-1 or Claude Sonnet 4.5?
Claude Sonnet 4.5 has the edge for knowledge tasks in this comparison, averaging 83.4 versus 75.9. Celeris-1 stays close enough that the answer can still flip depending on your workload.
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