Best OpenAI API Alternatives for Language Models
25 AI tools that can replace OpenAI API for working with large language models, ranked by how closely they match. The percentage is a match score, not a popularity score.
Replacing: OpenAI API — The API powering the AI ecosystemInput: text, images, audio, documents · Output: text, images, audio, video, code
1
Build on Claude's capabilities
Anthropic's developer API for building on its models; free tier and trial, from $17
Input: text, images, documents, code · Output: text, code
Free planFrom $17/mo
88%Strong alternative · same core category as OpenAI API
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
2
Every model, one endpoint
Single endpoint reaching many providers' models; free tier to start
Input: text, images, audio, video · Output: text, images, audio, video
Free planAPI
82%Strong alternative · same core category as OpenAI API
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
3
DeepSeek is an AI lab and chat assistant.
AI lab with its own chat assistant and API access; has a mobile app
Input: text, images, code · Output: text, code
Free planAPIMobile app
80%Strong alternative
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Also tagged for
SummarizingWritingCodingOpen Source ModelsHomework HelpMathTranslationChatbots
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
4
European AI with open-source roots
European provider with open-source roots; free tier, paid plans from $14.99
Input: text, images, audio, documents, code · Output: text, audio, code
Free planFrom $14.99/mo
78%Strong alternative
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Also tagged for
CodingOpen Source ModelsAI AgentsDocument ExtractionResearchChatbots
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
5
Enterprise AI for business language
Enterprise language AI for business, with open-source models; free tier and trial
Input: text, audio, documents · Output: text, data
Free plan
72%Partial replacement — covers the main need with gaps
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Also tagged for
Open Source ModelsAI AgentsChatbots
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
6
You're bouncing between creative work and technical tasks
Chat assistant spanning creative and technical work; API access and a free tier
Input: text, images, video, documents, code · Output: text, images, video, code
Free planFrom $9.99/moAPI
72%Partial replacement — covers the main need with gaps
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Also tagged for
SummarizingImage GenerationImage to ImageVideo GenerationCodingWebsite BuildingOpen Source ModelsPDF WorkHomework HelpMathTranslationResearch
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
7
The GitHub for machine learning
Input: text, images, audio, video · Output: text, images, audio, video, 3D
Free planFrom $9/mo
62%Partial replacement — covers the main need with gaps
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Also tagged for
Software DevelopmentOpen Source Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
8
62%Partial replacement — covers the main need with gaps
00
How the score adds up
Score set by our editors after reviewing both products; the overlap below is what they weighed.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
9
Vertex AI Model Garden is Google Cloud's catalog for finding, customizing and deploying machine learning models in one place.
Input: text, images, audio · Output: text, images, audio, video
61%Partial replacement — covers the main need with gaps
00
How the score adds up
- Built for Language Models (its core category)70/70
- Shares OpenAI API's other goals8/10
- Feature description similarity2/20
Capped below the editor-ranked picks above it.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Also tagged for
Open Source Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
10
Nucleotide Transformer is a set of foundation models pre-trained on DNA sequences, developed by InstaDeep with collaborators.
Input: data · Output: data
61%Partial replacement — covers the main need with gaps
00
How the score adds up
- Built for Language Models (its core category)70/70
- Shares OpenAI API's other goals4/10
- Feature description similarity2/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag OpenAI API for
Language Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
11
Evo 2 is a genomic foundation model from Arc Institute that handles prediction and design tasks across DNA, RNA and proteins.
Input: data · Output: data
Free plan
61%Partial replacement — covers the main need with gaps
00
How the score adds up
- Built for Language Models (its core category)70/70
- Shares OpenAI API's other goals4/10
- Feature description similarity1/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag OpenAI API for
Language Models
Also tagged for
Open Source Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
12
AI21 Labs builds foundation models and AI systems for the enterprise.
Foundation models and AI systems for the enterprise; free trial
Input: text · Output: text
Free trial
61%Partial replacement — covers the main need with gaps
00
How the score adds up
- Built for Language Models (its core category)70/70
- Shares OpenAI API's other goals8/10
- Feature description similarity9/20
Capped below the editor-ranked picks above it.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
13
Design Arena is a crowdsourced benchmark for AI-generated design where you describe what you want to make and watch top models produce it.
Input: text · Output: images, video, slides, apps
61%Partial replacement — covers the main need with gaps
00
How the score adds up
- Built for Language Models (its core category)70/70
- Shares OpenAI API's other goals4/10
- Feature description similarity2/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag OpenAI API for
Language Models
Also tagged for
Image GenerationVideo GenerationWebsite BuildingPresentations
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
14
Artificial Analysis is an independent AI benchmarking service that compares models and API hosting providers on quality, price, output speed and latency.
Input: text · Output: data
From $417/moAPITeams
61%Partial replacement — covers the main need with gaps
00
How the score adds up
- Built for Language Models (its core category)70/70
- Shares OpenAI API's other goals8/10
- Feature description similarity4/20
Capped below the editor-ranked picks above it.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
15
ModelScope is an open-source model community and hosting hub founded in June 2022 by the Institute for Intelligent Computing together with the CCF Open Source Development Committee.
Input: text, images, audio, video · Output: text, images, audio, video
61%Partial replacement — covers the main need with gaps
00
How the score adds up
- Built for Language Models (its core category)70/70
- Shares OpenAI API's other goals4/10
- Feature description similarity1/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag OpenAI API for
Language Models
Also tagged for
Open Source Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
16
LMArena, now branded Arena, is a place to chat with, compare and vote on AI models.
Input: text, images · Output: text, images, code
61%Partial replacement — covers the main need with gaps
00
How the score adds up
- Built for Language Models (its core category)70/70
- Shares OpenAI API's other goals4/10
- Feature description similarity2/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag OpenAI API for
Language Models
Also tagged for
Chatbots
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
17
All the AI chatbots in one place
Input: text, images, documents, code · Output: text, images, code
Free planFrom $19.99/mo
55%Limited overlap
00
How the score adds up
- Offers Language Models as a secondary capability42/70
- Shares OpenAI API's other goals8/10
- Feature description similarity5/20
Capped below the editor-ranked picks above it.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Also tagged for
WritingImage GenerationVideo GenerationCodingCharacter ChatChatbots
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
18
AI DevTool LLM Dev-Tools Chat
Input: text, images, code · Output: text, code
Free planFrom $19.9/mo
53%Limited overlap · same core category as OpenAI API
00
How the score adds up
- Offers Language Models as a secondary capability42/70
- Shares OpenAI API's other goals10/10
- Feature description similarity1/20
Capped below the editor-ranked picks above it.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
19
51%Limited overlap
00
How the score adds up
- Offers Language Models as a secondary capability42/70
- Shares OpenAI API's other goals4/10
- Feature description similarity5/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag OpenAI API for
Language Models
Also tagged for
Chatbots
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
20
Azure AI Foundry, now branded Microsoft Foundry, is Microsoft's enterprise platform for building, grounding and governing AI applications and agents.
Microsoft's enterprise platform for building and grounding AI apps and agents; team features
Input: text, images, audio · Output: text, images, apps
APITeams
54%Limited overlap · same core category as OpenAI API
00
How the score adds up
- Offers Language Models as a secondary capability42/70
- Shares OpenAI API's other goals10/10
- Feature description similarity2/20
Capped below the editor-ranked picks above it.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Also tagged for
Software DevelopmentAI Agents
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
21
Google doesn't say how developers actually access this system or what hardware it runs on, which matters when you're building physical robots that need to work in real environments
Input: text, images, video · Output: text
Free plan
49%Limited overlap
00
How the score adds up
- Offers Language Models as a secondary capability42/70
- Shares OpenAI API's other goals4/10
- Feature description similarity3/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag OpenAI API for
Language Models
Also tagged for
Robotics
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
22
Amazon SageMaker JumpStart is a machine learning hub inside AWS that gives teams a fast way to find, evaluate and deploy models.
Input: text, images, data · Output: text, images
APITeams
51%Limited overlap
00
How the score adds up
- Offers Language Models as a secondary capability42/70
- Shares OpenAI API's other goals8/10
- Feature description similarity1/20
Capped below the editor-ranked picks above it.
Shared goals 2 of the 2 we tag OpenAI API for
API IntegrationLanguage Models
Also tagged for
Software Development
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
23
AI assistant built to be helpful, harmless, and honest
Input: text, images, documents, code · Output: text, documents, data, code, slides
Free planFrom $20/moAPI
47%Limited overlap
00
How the score adds up
- Offers Language Models as a secondary capability42/70
- Shares OpenAI API's other goals4/10
- Feature description similarity1/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag OpenAI API for
Language Models
Also tagged for
Essay WritingRewritingSummarizingWritingCodingAI AgentsDocument CreationPDF WorkPresentationsSpreadsheetsHomework HelpMath
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
24
Mistral Vibe, formerly Le Chat, is Mistral's AI assistant that combines conversational chat with an agent for longer tasks and coding.
Input: text, images, documents, code · Output: text, images, code
Free planFrom $14.99/moTeams
49%Limited overlap
00
How the score adds up
- Offers Language Models as a secondary capability42/70
- Shares OpenAI API's other goals4/10
- Feature description similarity3/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag OpenAI API for
Language Models
Also tagged for
SummarizingWritingImage GenerationCodingAI AgentsPDF WorkTranslationResearchChatbots
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
25
Gemma is Google DeepMind's family of open models that developers use to build AI applications running on phones, laptops and cloud servers.
Input: text, images · Output: text
47%Limited overlap
00
How the score adds up
- Offers Language Models as a secondary capability42/70
- Shares OpenAI API's other goals4/10
- Feature description similarity2/20
Capped below the editor-ranked picks above it.
Shared goals 1 of the 2 we tag OpenAI API for
Language Models
Also tagged for
Open Source Models
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
Can it really replace OpenAI API for working with large language models? Vote on each alternative — no account needed. Votes gently reorder the list; they never change the match score.
Missing an alternative for working with large language models? Suggest it
At a glance: top OpenAI API alternatives for Language Models
| Tool | Match | Input | Output | Pricing | Free plan | Rating | Category |
|---|---|---|---|---|---|---|---|
| Anthropic Claude API | 88% | text, images, documents, code | text, code | From $17/mo | Yes | — | AI API |
| OpenRouter | 82% | text, images, audio, video | text, images, audio, video | Freemium | Yes | — | AI API |
| DeepSeek | 80% | text, images, code | text, code | Freemium | Yes | — | Large Language Models (LLMs) |
| Mistral AI | 78% | text, images, audio, documents, code | text, audio, code | From $14.99/mo | Yes | — | Large Language Models (LLMs) |
| Cohere | 72% | text, audio, documents | text, data | Freemium | Yes | — | Large Language Models (LLMs) |
| Qwen | 72% | text, images, video, documents, code | text, images, video, code | From $9.99/mo | Yes | — | AI Chatbot |
Frequently asked
What is the best OpenAI API alternative for working with large language models?
Anthropic Claude API (88% match) is the closest alternative to OpenAI API for working with large language models: Build on Claude's capabilities. OpenRouter (82% match) and DeepSeek (80% match) come next.
Is there a free alternative to OpenAI API for working with large language models?
Yes. 15 of the 25 ranked alternatives have a free plan or free tier, including Anthropic Claude API, OpenRouter, DeepSeek.
How is the match percentage calculated?
It measures how much of OpenAI API's job a tool can take over for working with large language models: shared core category, how many of the same use cases it covers and how similar its feature set is. Popularity and ratings never change the percentage; they only break ties in the order. Lists are recomputed nightly and reviewed by editors for the most-visited tools.
How this list is ranked
The match score measures how much of OpenAI API's job each tool can take over when the goal is working with large language models: shared core category, how many of the same use cases it covers, and how similar its feature set is. Popularity and ratings do not change the score; they only break ties in the order.
Lists are recomputed nightly from the live catalog and reviewed by our editors for the most-visited tools. Sponsored placements are marked and sit outside the ranking.