allenai/Olmo-3-7B-Instruct
Original7.3Bparameters
Fixture12.9Mparameters
Layer stacks1compared
Findings0to review
✓ Same architecture, smaller
Every module class, layer kind and checked property of the original is in the fixture.
Layer stacks
One square per layer, colored by kind: the layer's module classes and type attributes. Hover a square for its index and kind.
model.layers
Original · 32
Fixture · 2
| Kind | Original | Fixture | |
|---|---|---|---|
| sliding_attention | 24 | 1 | ✓ kept |
| full_attention | 8 | 1 | ✓ kept |
Where the parameters are
Share of each model's parameters per component. Vocabulary and patch sizes are kept, so embeddings usually take a larger share of the fixture.
Original
Fixture
| Component | Original | Share | Fixture | Share |
|---|---|---|---|---|
| model.layers | 6.5B | 88.7% | 82.4K | 0.6% |
| lm_head | 410.7M | 5.6% | 6.4M | 49.7% |
| model.embed_tokens | 410.7M | 5.6% | 6.4M | 49.7% |
| model.norm | 4.1K | 0.0% | 64 | 0.0% |
Preserved properties
| Config | Property | Original | Fixture | |
|---|---|---|---|---|
| model | attention style | MHA (32 heads, 32 KV) | MHA (4 heads, 4 KV) | ✓ kept |
| model | model_type | olmo3 | olmo3 | ✓ kept |
| model | vocab_size | 100278 | 100278 | ✓ kept |
| model | tie_word_embeddings | False | False | ✓ kept |
| model | hidden_act | silu | silu | ✓ kept |
| model | max_position_embeddings | 65536 | 65536 | ✓ kept |
Module classes
Instances of each class in the built model (prefix Olmo3 omitted).
| Class | Original | Fixture |
|---|---|---|
| Linear | 225 | 15 |
| RMSNorm | 129 | 9 |
| Attention | 32 | 2 |
| DecoderLayer | 32 | 2 |
| MLP | 32 | 2 |
| SiLUActivation | 32 | 2 |
| Embedding | 1 | 1 |
| ModuleList | 1 | 1 |
| ForCausalLM | 1 | 1 |
| Model | 1 | 1 |
| RotaryEmbedding | 1 | 1 |
Config changes
6 fields changed, 23 unchanged.
| Field | Original | Fixture |
|---|---|---|
| hidden_size | 4096 | 64 |
| intermediate_size | 11008 | 128 |
| layer_types | 32 entries: 24× sliding_attention, 8× full_attention | ["sliding_attention", "full_attention"] |
| num_attention_heads | 32 | 4 |
| num_hidden_layers | 32 | 2 |
| num_key_value_heads | 32 | 4 |