Cohere vs OpenAI API
Cohere is an enterprise-focused AI company offering its Command language models plus embedding and rerank models for search and retrieval, available through its own API and major clouds. The OpenAI API gives pay-per-token access to OpenAI's GPT family, currently led by GPT-6 in Luna, Sol and Astra tiers, with no free tier. Choose Cohere for retrieval-heavy enterprise workloads with sales-led pricing, and the OpenAI API for the broadest general-purpose models with published per-token rates.
Facts checked on against the official sources listed at the end. Usage numbers update daily.
Best for
Enterprise search and retrieval stacks using embeddings, rerank and Command models
Free plan. Paid from $0.30 input / $0.60 output per million tokens on Command-light; current flagship Command A models are priced on request.
Best for
General-purpose apps wanting top GPT models with published per-token pricing
No free plan. Paid from $0.10 input / $0.50 output per million tokens on GPT-6 Luna.
Cohere vs OpenAI API at a glance
| Compared on | Cohere | OpenAI API |
|---|---|---|
| Model focus | Command language models, embeddings and rerank for retrieval | GPT language model family for general-purpose tasks |
| Current flagship tiers | Command A and Command A+ | GPT-6 Luna, Sol and Astra, plus earlier GPT-5.6 |
| Flagship pricing visibility | Quoted directly by sales for the newest models | Published per million tokens for each tier |
| Dedicated capacity | Model Vault dedicated instances billed hourly or monthly | Per-token usage, with batch and cached-input discounts |
| Cloud availability | Amazon Bedrock, Google Cloud and Microsoft Azure | Microsoft Azure OpenAI Service |
| Trying it out | Free evaluation keys with limited usage | No free tier; billed from the first request |
| Open source | No, Proprietary | No, Proprietary |
| Free plan | Yes: evaluation API keys are free but limited in usage | No, the API has no free tier and is billed per token from the first request |
| Paid plans from | $0.30 input / $0.60 output per million tokens on Command-light; current flagship Command A models are priced on request | $0.10 input / $0.50 output per million tokens on GPT-6 Luna |
| Made by | Cohere | OpenAI |
What's the difference between Cohere and OpenAI API?
Retrieval tooling vs general models
Cohere's offering centres on embeddings and rerank models that improve search and retrieval, alongside its Command models. The OpenAI API is centred on its GPT models for generation, reasoning and coding.
Transparency of pricing
OpenAI publishes rates for its tiers, from GPT-6 Luna at $0.10 input and $0.50 output per million tokens up to Astra. Cohere lists older Command models but quotes its current Command A and A+ flagships through sales.
Reserved capacity
Cohere offers Model Vault dedicated instances, billed from $4 an hour or $2,500 a month, for teams that want reserved capacity. The OpenAI API is usage-based, with batch processing at about half price and cached input discounted around 90%.
Where you can run it
Cohere is available through Amazon Bedrock, Google Cloud and Azure as well as its own API. The OpenAI API is also offered on Azure through Azure OpenAI Service.
Cohere vs OpenAI API pricing
OpenAI's rates are public and per token. Cohere has free evaluation keys, public rates for older models and sales-quoted pricing for its newest flagships.
Cohere
Evaluation keys are free but limited. Command-light is $0.30 input and $0.60 output per million tokens, Command R+ is $3.00 and $15.00. Command A and A+ pricing is by quote. Model Vault starts from $4 an hour or $2,500 a month.
- Evaluation key
- $0
- Command-light
- $0.30 input / $0.60 output per million tokens
- Command R+ (04-2024)
- $3.00 input / $15.00 output per million tokens
- Command A / Command A+
- Contact sales
- Model Vault (Embed 4, Rerank, Parse)
- From $4 an hour or $2,500 a month
OpenAI API
No free tier. GPT-6 Luna is $0.10 input and $0.50 output per million tokens, Sol $2.00 and $10.00, Astra $10.00 and $50.00 for short-context calls. Batch is about 50% off, and cached input is discounted around 90%.
- GPT-6 Luna
- $0.10 input / $0.50 output per million tokens
- GPT-6 Sol
- $2.00 input / $10.00 output per million tokens
- GPT-6 Astra
- $10.00 input / $50.00 output per million tokens
- gpt-5.3-codex
- $1.75 input / $14.00 output per million tokens
- Batch processing
- About 50% off standard model rates
Prices in USD from the official pricing pages on 5 October 2026. They change often, so confirm on cohere.com and developers.openai.com before you commit.
Usage and activity
Weekly npm downloads: 556k for cohere-ai and 51M for openai.
| Measure | Cohere | OpenAI API |
|---|---|---|
| GitHub stars | No public repository | 11,206 |
| npm downloads a week | 556k (cohere-ai) | 51M (openai) |
| Latest release | None on GitHub | v7.30.0, 1 day ago |
| Releases in 90 days | 0 | 10 |
From the public GitHub and npm APIs, updated daily. Stars and downloads show developer interest, not product quality.
Should you choose Cohere or OpenAI API?
Choose Cohere if
- You are building enterprise search or retrieval-augmented generation
- You want embedding and rerank models from the same vendor as your language model
- You prefer negotiated pricing and dedicated instances
- You want to consume models through Bedrock, Google Cloud or Azure
Choose OpenAI API if
- You want the most widely used general-purpose model family
- You want clear published per-token prices at several price and speed points
- You need batch processing or cached-input discounts to cut costs
- You are happy with usage-based billing and no sales conversation
Switching between Cohere and OpenAI API
Both are called through REST APIs, so the core change is swapping the client, model names and prompt formats. Retrieval pipelines are the harder part: if you use Cohere embeddings or rerank, moving to OpenAI means re-embedding your corpus and re-evaluating retrieval quality, because vectors from different models are not interchangeable.
Cohere vs OpenAI API: common questions
Does Cohere have a free tier?
It offers free evaluation API keys with limited usage. Production use is paid.
Does the OpenAI API have a free tier?
No. It is billed per token from the first request. ChatGPT, the consumer app, has a separate free plan.
Why is Cohere's flagship pricing not listed?
Pricing for the current Command A and Command A+ models is quoted directly by Cohere's sales team.
Which has embedding and rerank models?
Cohere offers dedicated embedding and rerank models for search and retrieval as a core product line.
Can I use both?
Yes. Some teams use Cohere's embeddings and rerank for retrieval and another provider's model for generation.
Other options to consider
All ai platforms & apis tools
Anthropic
AI research company that makes the Claude models, the Claude apps and the Claude API.
OpenAI
AI research company behind ChatGPT and the GPT model family, accessed through apps and an API.
Ollama
Run open source AI models locally, with an optional hosted cloud and Pro plan.
Hugging Face
Hub for open source AI models, datasets and demo apps, plus paid hosting for inference and Spaces.
Sources
More sources for each tool are on the Cohere and OpenAI API pages.
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