These tools competes with

TinkervsUnsloth

Managed distributed fine-tuning API from Thinking Machines Lab versus 2× faster, 70% less memory LoRA fine-tuning

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Choose Tinker when…

  • You want a managed fine-tuning API instead of running training infra yourself
  • You need to fine-tune large open-weight MoE models without provisioning GPU clusters
  • You're comparing a hosted training loop against library-based options like Axolotl/Unsloth

Choose Unsloth when…

  • You want the fastest OSS LoRA fine-tuning with minimal GPU memory
  • You're fine-tuning Llama, Mistral, or Gemma models
  • Memory constraints are the bottleneck in your training setup

Side-by-side comparison

Field
Tinker
Unsloth
Category
Fine-tuning
Fine-tuning
Type
Commercial
Open Source
Free Tier
✗ No
✓ Yes
Pricing Plans
Usage-based: Per-token, varies by model
Pro: $29/mo
GitHub Stars
32,000
Health
95 Active

Tinker

Hosted fine-tuning API (LoRA and full fine-tune) for open-weight models, including large MoE models, from Mira Murati's Thinking Machines Lab. A managed-training-loop alternative to library-based tools like Axolotl or Unsloth — usage-based per-token pricing that varies by model.

Unsloth

Dramatically speeds up LoRA and QLoRA fine-tuning by rewriting GPU kernels. Compatible with HuggingFace and works with Llama, Mistral, Gemma, and more. No accuracy loss.

Shared Connections1 tool both integrate with

Only Tinker (1)

Unsloth

Only Unsloth (5)

AxolotlLlamaFactoryTorchtunevLLMTinker

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