Mellum vs Space Bunny Alpha
| Signal | Mellum | Delta | Space Bunny Alpha |
|---|---|---|---|
Capabilities | 17 | -67 | |
Pricing | 100 | -- | |
Context window size | 0 | -95 | |
Recency | 45 | -55 | |
Output Capacity | 20 | -71 | |
Benchmarks | 0 | -17 | |
| Overall Result | 0 wins | of 6 | 5 wins |
Score History
20.2
current score
Tied
right now
20.2
current score
Mellum
JetBrains
Space Bunny Alpha
stealth
| Metric | Mellum | Space Bunny Alpha | Winner |
|---|---|---|---|
| Overall Score | 20 | 20 | -- |
| Rank | #435 | #434 | Space Bunny Alpha |
| Quality Rank | #435 | #434 | Space Bunny Alpha |
| Adoption Rank | #435 | #434 | Space Bunny Alpha |
| Parameters | -- | -- | -- |
| Context Window | -- | 1000K | -- |
| Pricing | Free | Free | -- |
| Signal Scores | |||
| Capabilities | 17 | 83 | Space Bunny Alpha |
| Pricing | 100 | 100 | Mellum |
| Context window size | 0 | 95 | Space Bunny Alpha |
| Recency | 45 | 100 | Space Bunny Alpha |
| Output Capacity | 20 | 91 | Space Bunny Alpha |
| Benchmarks | -- | 17 | Space Bunny Alpha |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 20/100 (rank #435), placing it in the top -50% of all 290 models tracked.
Scores 20/100 (rank #434), placing it in the top -49% of all 290 models tracked.
With only a 0-point gap, these models are in the same performance tier. The practical difference in output quality is minimal - your choice should depend on pricing, latency requirements, and specific feature needs.
Choose Mellum when you need:
- Budget-friendly applications with moderate quality requirements
Choose Space Bunny Alpha when you need:
- Processing long documents or large codebases (1000K token context)
- Multimodal workflows that require image understanding
- Agentic applications using tool/function calling
- Step-by-step reasoning and chain-of-thought problem solving
Both models are priced similarly, so the decision comes down to quality and features rather than cost.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. Mellum also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1000K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($0.00/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (20/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
Mellum and Space Bunny Alpha are extremely close in overall performance (only 0 points apart). Your best choice depends entirely on which specific strengths matter most for your use case.
By Use Case
Best for Quality
Mellum
Marginally better benchmark scores; both are excellent
Best for Cost
Mellum
0% lower pricing; better value at scale
Best for Reliability
Mellum
Higher uptime and faster response speeds
Best for Prototyping
Mellum
Stronger community support and better developer experience
Best for Production
Mellum
Wider enterprise adoption and proven at scale
by JetBrains
- Choose for Quality - Marginally better benchmark scores; both are excellent
- Choose for Cost - 0% lower pricing; better value at scale
- Choose for Reliability - Higher uptime and faster response speeds
- Choose for Prototyping - Stronger community support and better developer experience
- Choose for Production - Wider enterprise adoption and proven at scale
| Capability | Mellum | Space Bunny Alpha |
|---|---|---|
| Vision (Image Input)differs | ||
| Function Callingdiffers | ||
| Streaming | ||
| JSON Modediffers | ||
| Reasoningdiffers | ||
| Web Search | ||
| Image Output |
Mellum
JetBrains
Space Bunny Alpha
stealth
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | Mellum | Space Bunny Alpha |
|---|---|---|
| Context Window | -- | 1M |
| Max Output Tokens | -- | 524,288 |
| Open Source | No | No |
| Created | Jun 1, 2025 | Sep 23, 2026 |