Open-source alternatives to Claude API

Claude API in the AI category. These are the open alternatives we recommend looking at.

DeepSeek-R1

Large language model from DeepSeek trained for multi-step reasoning such as maths and code.

MITPermissive

SaaS: YesClosed product: Yes

Deployment
transformers

gpt-oss (20B / 120B)

Open-weight language models from OpenAI under Apache-2.0.

Apache-2.0Permissive

SaaS: YesClosed product: Yes

Deployment
Ollama, vLLM

Mistral-7B-Instruct-v0.3

Instruction-tuned language model from Mistral AI with 7 billion parameters and function calling. Based on mistralai/Mistral-7B-v0.3.

Apache-2.0Permissive

SaaS: YesClosed product: Yes

Deployment
vllm

Qwen2.5-7B-Instruct

Instruction-tuned language model from Qwen with 7 billion parameters for chat, code and multilingual tasks. Based on Qwen/Qwen2.5-7B.

Apache-2.0Permissive

SaaS: YesClosed product: Yes

Deployment
transformers

phi-4

Smaller language model from Microsoft with 14 billion parameters, focused on reasoning.

MITPermissive

SaaS: YesClosed product: Yes

Deployment
transformers

This is guidance, not legal advice (inte juridisk rådgivning). Check with a lawyer before deciding.

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