C

Celeris 1

Jul 2026
CCeleris 1
Compare in
on
$0.05per task?
$0.20 / $0.70per 1M in / out
1,521 tok/sfirst token in 0.5 s?
131Kcontext

Ranking?

Full ranking →
1Opus 5.561.42Fable 5.159.13Gemini 4 Argon57.14Fable 555.55Sonnet 5.555
···
227LFM2.5 8B A1B6.9228Celeris 16.8228Gemini 2.5 Flash Lite6.8

Strong at

C
Coding#75 of 132Agents & work tasks#122 of 175Reasoning#226 of 334Science#216 of 312Long context#201 of 273Knowledge#294 of 318

Benchmarks

in Chat & Knowledge
AA Intelligence Index 4.3.26.3#290
AA Omniscience Index-71.6#297
AA Omniscience · Accuracy11#275
AA Omniscience · Hallucination Rate92.8#281
Humanity's Last Exam6.8#228
GPQA Diamond63.1#218
AA-LCR (long context) 1.138#203
CritPt (physics)0#180
GDP.pdf · AA all-pass1.2#114

FAQ

How much does Celeris 1 cost?›

$0.20 per 1M input tokens and $0.70 per 1M output tokens. A typical benchmark task costs about $0.05 at default effort.

Is Celeris 1 free to use?›

There is no free API; the cheapest paid price is $0.20 per 1M input tokens.

How good is Celeris 1, and what is it best at?›

#226 of 334 in Chat & Knowledge, #75 of 132 in Coding, #123 of 133 in Agents & Tool Use, #114 of 133 in Vision & Documents.

Is Celeris 1 better than Gemini 2.5 Flash Lite?›

On Humanity's Last Exam, Celeris 1 scores 6.8 vs 6.8 — about the same.

How can I use Celeris 1?›

Through the API of Celeris.

What is the context window of Celeris 1?›

131K tokens.

When was Celeris 1 released? Is there a newer version?›

Released 2026-07-24. It is the current version in its line.

Is Celeris 1 open source?›

No, Celeris 1 is a closed model available through an API. The closest open-weights option here is MiMo v2.6 Pro.

Can Celeris 1 read images?›

No, it accepts text only.

What is Celeris 1?›

Celeris 1 is a closed language model from Celeris, released Jul 2026.

What are the best alternatives to Celeris 1?›

Agnes 2.5 Pro Beta (cheaper), GPT-6 Luna (better), MiMo v2.6 Pro (open weights).