AFM 4.5B
AFM 4.5B is released 2025-07-29 in the AFM family with open-source; evaluate it while provider pricing coverage matures.
Use it for
- Teams evaluating general LLM work
- Workloads that can use a 66k 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
- AFM
- Released
- 2025-07-29
- Context
- 66k
- Parameters
- 4.5B
- Architecture
- Decoder Only
- Openness
- Open source
- License
- Apache 2.0OSI-approvedCommercial use: permitted
- Weights
- Available
- Code
- Unknown
- Training
- Pretrained
No tracked provider token pricing is available yet.
About
Arcee Foundation Model 4.5B — a dense 4.5B parameter model and proof-of-concept for the Trinity MoE series. Trained on 8T tokens. Extended to 64K context (from original 32K) in a subsequent update. Full open-source release July 2025 under Apache 2.0. Note: previously mislabeled as 'Trinity 4.5B' in some databases; it is a separate model family from the Trinity MoE line.
AFM 4.5B is an open-source model in the AFM family. The structured metadata tracks a 66k-token context window. No headline benchmark score is tracked for AFM 4.5B yet.
Top use-case fit
No primary decision-task fit is mapped for this model yet.
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 Coding
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
Frequently asked questions
What is the context window of AFM 4.5B?
AFM 4.5B has a context window of 66k tokens.
When was AFM 4.5B released?
AFM 4.5B was released on 2025-07-29.
No tracked provider token pricing is available yet.