GPT-5 Nano vs Bonsai 8B
At a Glance
| Compare |  GPT-5 NanoOpenAI |  Bonsai 8BPrismML |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | #46 of 460.0 score · 2/3 sources · provisional · missing LiveBench · full-core range 0.0–33.3 | UnrankedNot in the 46-model eligible cohort |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $0.025Openrouter ↗ · Sep 3, 2026 | Not reported |
| Output priceFrom · USD / 1M tokens | $0.20Openrouter ↗ · Sep 3, 2026 | Not reported |
| Context windowMaximum documented tokens | 400K | 66K |
| Model facts checked | Sep 3, 2026View model evidence → | Sep 18, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
Side-by-Side Facts
| Field | GPT-5 Nano | Bonsai 8B |
|---|---|---|
| Developer | OpenAI | PrismML |
| Family | Gpt 5 | Bonsai 8b |
| Model | GPT-5 Nano | Bonsai 8B |
| Version | GPT-5 Nano | Bonsai 8B |
| Lifecycle | active | active |
| Released | 2025-08-07 | 2026-03-18 |
| Knowledge cutoff | 2024-05-31 | Unknown |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
| Context window | 400K | 66K |
| Total parameters | Unknown | 8.2B |
| Active parameters | Unknown | Unknown |
| License | Unknown | apache-2.0 |
| Open weights | No | Yes |
| API available | Yes | No |
| Self-hostable | No | Yes |
| Provider access | Openai (Standard), Openrouter (Standard) | Unknown |
| Capabilities | chat, generation, reasoning, structured_outputs, tools | chat, generation |
| Effective bit width | Unknown | 1 bit per weight |
| Weight size | Unknown | 1.16 GB |
| Weight format | Unknown | Binary Q1_0 |
GPT-5 Nano Capabilities
Bonsai 8B Capabilities
Related Comparisons
All text comparisons →| A | Pair | B | Context |
|---|---|---|---|
GPT-5 NanoOpenAI | vs | GPT-6 AstraOpenAI | family variantsimage, text |
Claude Fable 5.1Anthropic | vs | GPT-5 NanoOpenAI | cross-developer peersimage, text |
 Gemini 3.1 ProGoogle DeepMind | vs | GPT-5 NanoOpenAI | cross-developer peerstext |
 DeepSeek-V4.1-FlashDeepSeek | vs | GPT-5 NanoOpenAI | cross-developer peersimage, text |
GPT-5 NanoOpenAI | vs | Grok 4.6xAI | cross-developer peersimage, text |
GPT-5 NanoOpenAI | vs |  Qwen3.8-MaxQwen | cross-developer peersimage, text |
 Kimi-K3Moonshot AI | vs | GPT-5 NanoOpenAI | cross-developer peersimage, text |
 MiniMax-M3MiniMax | vs | GPT-5 NanoOpenAI | cross-developer peersimage, text |
GPT-5 NanoOpenAI | vs |  GLM-5.3Z.ai | cross-developer peerstext |
GPT-5 NanoOpenAI | vs |  Hy4 previewTencent | cross-developer peerstext |
Seed 2.1 ProByteDance Seed | vs | GPT-5 NanoOpenAI | cross-developer peersimage, text |
 Mistral Large 3Mistral AI | vs | GPT-5 NanoOpenAI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
GPT-5 Nano vs Bonsai 8B FAQs
Is GPT-5 Nano or Bonsai 8B better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both GPT-5 Nano and Bonsai 8B, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, GPT-5 Nano or Bonsai 8B?+
Only GPT-5 Nano has a directly sourced input price: $0.025 per million tokens. Only GPT-5 Nano has a directly sourced output price: $0.20 per million tokens.
Which has a larger context window, GPT-5 Nano or Bonsai 8B?+
GPT-5 Nano has the larger sourced context window. GPT-5 Nano supports 400K and Bonsai 8B supports 66K.
Which performs better in benchmarks, GPT-5 Nano or Bonsai 8B?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can GPT-5 Nano or Bonsai 8B be self-hosted?+
Bonsai 8B is the only model in this pair currently marked as self-hostable. GPT-5 Nano is not marked open weight; Bonsai 8B is open weight.
Can GPT-5 Nano and Bonsai 8B understand images?+
GPT-5 Nano is documented with image input; Bonsai 8B is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, GPT-5 Nano or Bonsai 8B?+
Neither has a larger sourced maximum output. GPT-5 Nano is 128K and Bonsai 8B is —.
Do GPT-5 Nano and Bonsai 8B support reasoning and tool use?+
GPT-5 Nano: reasoning, tool calling, and image input. Bonsai 8B: none of these features are definitively sourced. Feature support does not establish relative quality.
Which is available from more inference providers, GPT-5 Nano or Bonsai 8B?+
GPT-5 Nano has 2 sourced provider routes; Bonsai 8B has 0, so GPT-5 Nano has broader tracked availability.
Which offers better value, GPT-5 Nano or Bonsai 8B?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.