Space Bunny Alpha is free for input tokens while Claude Sonnet 5 costs $2 per 1M tokens.
API cost decision in 10 seconds
NewSpace Bunny Alpha vs Claude Sonnet 5
Pick Space Bunny Alpha when budget is the priority.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Space Bunny Alpha when budget is the priority.
On the standard 1M input plus 500K output workload, Space Bunny Alpha is estimated at $0 vs $7 for Claude Sonnet 5, saving $7 (100% lower).
Cost-first pickSpace Bunny Alpha
Context-first pickBoth models
Sample savings$7100%
10x traffic gap$70
The reported context window is tied, so cost and provider fit carry more weight. At 10x that traffic, the same price gap is about $70. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Space Bunny Alpha stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Space Bunny Alpha | Claude Sonnet 5 |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Space Bunny Alpha | $0 | $15 |
| Balanced workload | 1M input + 1M output | Space Bunny Alpha | $0 | $12 |
| Output-heavy chatbot | 1M input + 5M output | Space Bunny Alpha | $0 | $52 |
Space Bunny Alpha is free for output tokens while Claude Sonnet 5 costs $10 per 1M tokens.
Both models report the same context window at 1M tokens.
Space Bunny Alpha is free for the standard workload while the other model is estimated at $7.
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
Space Bunny Alpha has the lower input price; Space Bunny Alpha has the lower output price; both models report the same context window. For the 1M input plus 500K output sample, Space Bunny Alpha is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $0 for Space Bunny Alpha and $7 for Claude Sonnet 5.
Choose Space Bunny Alpha when you care most about lower input-token price, and lower output-token price.
Choose Claude Sonnet 5 when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
- On the standard 1M input plus 500K output workload, Space Bunny Alpha is estimated at $0 vs $7 for Claude Sonnet 5, saving $7 (100% lower).
- Space Bunny Alpha is free for the standard workload while the other model is estimated at $7.
- Space Bunny Alpha is free for input tokens while Claude Sonnet 5 costs $2 per 1M tokens.
- Space Bunny Alpha is free for output tokens while Claude Sonnet 5 costs $10 per 1M tokens.
- Both models report the same context window at 1M tokens.
| Feature | NewSpace Bunny Alpha (stealth) | Claude Sonnet 5 (Anthropic) |
|---|---|---|
| Input Price prompt tokens per 1M | $0 | $2 |
| Completion Price per 1M tokens | $0 | $10 |
| Sample Workload Cost 1M input + 500K output | $0 | $7 |
| Context Window | 1M | 1M |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Space Bunny Alpha | On the standard 1M input plus 500K output workload, Space Bunny Alpha is estimated at $0 vs $7 for Claude Sonnet 5, saving $7 (100% lower). |
| High-volume input processing | Space Bunny Alpha | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Space Bunny Alpha | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Tie | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Claude 3 Haiku can replace Claude Sonnet 5 when lower sample workload cost matters most: $0.88.
- Claude Haiku 4.5 (batch) can replace Claude Sonnet 5 when lower sample workload cost matters most: $1.75.
- Claude 3.5 Haiku can replace Claude Sonnet 5 when lower sample workload cost matters most: $2.8.
- Claude Sonnet 5 (batch) can replace Claude Sonnet 5 when lower sample workload cost matters most: $3.5.
- Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- GLM 5.3 Flash offers 1.31M context with $0.4 sample workload cost.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.36 sample workload cost.
- MiMo-V2.6-Pro · Xiaomi · #1
- GLM 5.3 Flash · Z.ai · #2
- DeepSeek V4.1 Flash · DeepSeek · #3
- Hy4 preview · Tencent · #4
Cheaper alternatives
Review low-cost models sorted by a standard 1M input plus 500K output workload.
Open cheapest modelsLarger context alternatives
Find models with larger context windows for RAG, long documents, and codebase review.
Open largest context modelsProvider catalogs
Compare models within provider hubs before choosing a final API vendor.
Open provider hubsstealth catalog
Review all tracked stealth models before deciding whether this matchup is the right shortlist.
Open stealth modelsAnthropic catalog
Check other Anthropic models with comparable pricing, context, or release timing.
Open Anthropic modelsSpace Bunny Alpha is an anonymous large model with blazing-fast inference, strong coding capabilities and native multimodal input support. It delivers adjustable reasoning effort, and a 1M-token context window. Space...
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