Colosseum 355B Instruct vs Together AI - Gemma 3n-e4B
Colosseum 355B Instruct (2025) and Together AI - Gemma 3n-e4B (2026) are compact production models from iGenius and Google DeepMind. Colosseum 355B Instruct ships a 16k-token context window, while Together AI - Gemma 3n-e4B ships a 8k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Together AI - Gemma 3n-e4B is safer overall; choose Colosseum 355B Instruct when long-context analysis matters.
Decision scorecard
Local evidence first| Signal | Colosseum 355B Instruct | Together AI - Gemma 3n-e4B |
|---|---|---|
| Best for | general production evaluation | tool-calling agents |
| Decision fit | General | Agents, Classification, and JSON / Tool use |
| Context window | 16k | 8k |
| Cheapest output | - | $0.04/1M tokens |
| Provider routes | 1 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Colosseum 355B Instruct has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Together AI - Gemma 3n-e4B uniquely exposes JSON / Tool use and Structured outputs in local model data.
- Local decision data tags Together AI - Gemma 3n-e4B for Agents, Classification, and JSON / Tool use.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Colosseum 355B Instruct
Unavailable
No complete token price in local provider data
Together AI - Gemma 3n-e4B
$26.00
Cheapest tracked route/tier: Together AI
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Colosseum 355B Instruct and Together AI - Gemma 3n-e4B; plan for SDK, billing, or endpoint changes.
- Together AI - Gemma 3n-e4B adds JSON / Tool use and Structured outputs in local capability data.
- No overlapping tracked provider route is sourced for Together AI - Gemma 3n-e4B and Colosseum 355B Instruct; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for JSON / Tool use and Structured outputs before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-01-01 | 2026-03-15 |
| Context window | 16k | 8k |
| Parameters | 355B | 4B |
| Architecture | Decoder Only | Decoder Only |
| License | Llama 3 Community | Gemma |
| Openness | Open weights | Open weights |
| Weights | Unknown | Unknown |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | - | 2024-06 |
Pricing and availability
| Pricing attribute | Colosseum 355B Instruct | Together AI - Gemma 3n-e4B |
|---|---|---|
| Input price | - | $0.02/1M tokens |
| Output price | - | $0.04/1M tokens |
| Providers |
Capabilities
| Capability | Colosseum 355B Instruct | Together AI - Gemma 3n-e4B |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | No |
| JSON / Tool use | No | Yes |
| Structured outputs | No | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Continue comparing
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Popular comparisons for Colosseum 355B Instruct
Popular comparisons for Together AI - Gemma 3n-e4B
- Together AI - Gemma 3n-e4B vs Hunyuan Hy3 Preview
- Together AI - Gemma 3n-e4B vs Phi-4 Mini Flash Reasoning
- Together AI - Gemma 3n-e4B vs Granite Guardian 3.0 8B
- Together AI - Gemma 3n-e4B vs Nemotron Mini 4B Instruct
- Together AI - Gemma 3n-e4B vs Xiaomi MiMo-V2.5-Pro
- Together AI - Gemma 3n-e4B vs Stockmark 2 100B Instruct
Last reviewed: 2026-06-29. Data sourced from public model cards and provider documentation.