Colosseum 355B
Colosseum 355B is a released long context model with open-weight and 131k context; evaluate it while provider pricing coverage matures.
Use it for
- Teams evaluating long context
- Workloads that can use a 131k context window
Do not use it for
- Cost-sensitive launches that need sourced token pricing
- Vision or document-understanding workloads
- Strict JSON or tool-calling flows
- Family
- Colosseum
- Released
- 2025-03-10
- Context
- 131k
- Parameters
- 355B
- Openness
- Open weights
- License
- Llama 3 CommunityCommercial use: conditional
- Weights
- Unknown
- Code
- Unknown
No tracked provider token pricing is available yet.
About
Pre-instruct base model for Colosseum series. Custom dense architecture trained from scratch on Italian and multilingual data. Serves as foundation for instruction-tuned variants.
Colosseum 355B is an open-weight model in the Colosseum family. The structured metadata tracks a 131k-token context window. No headline benchmark score is tracked for Colosseum 355B yet.
Top use-case fit
Long context
Included by capability and metadata signals in the decision map.
Provider price ladder
No tracked provider token pricing is available for this model yet.
Capabilities
No model capability flags are currently sourced.
Benchmark peer barsfor Long context
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
Compare Colosseum 355B with other models
Frequently asked questions
What is the context window of Colosseum 355B?
Colosseum 355B has a context window of 131k tokens.
When was Colosseum 355B released?
Colosseum 355B was released on 2025-03-10.