Side-by-side comparison · Coding & Dev Tools
Claude Code vs OpenAI Codex vs Vapi
Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.
Comparing 3 tools, the maximum.
At a glance
Pick it if: Anyone building software, from first-timers to senior engineers, who wants an AI that does the work itself.
Pick it if: ChatGPT subscribers who want a coding agent without paying for a second subscription.
Pick it if: Developers and voice AI agencies building custom phone or in-app voice agents.
Claude Code scores highest overall, but OpenAI Codex gives you more for your money. Which one is right comes down to what you value most.
Overview
| Attribute | Claude Code | OpenAI Codex | Vapi |
|---|---|---|---|
| In one line | An AI agent that works inside your project: it reads, writes and runs the code for you. | OpenAI's coding agent. Hand it a task and it works away while you do other things. | Developer platform for building voice AI agents that make and take phone calls. |
| Pricing model | Paid | Freemium | Paid |
| Starting price | $20/mo | $8/mo | $0.05/min hosting |
| Free plan | No | Yes | No |
| Works with Claude Code | Yes | No | Yes |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Claude Code | OpenAI Codex | Vapi |
|---|---|---|---|
| Overall rating | 4.4Winner | 4.2 | 3.6 |
| Ease of useHow quickly someone non-technical gets value from it. | 3.5 | 3.5 | 2.5 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 5.0 | 4.5 | 4.5 |
| Output qualityHow good the results are before you fix them. | 5.0 | 4.5 | 4.0 |
| Value for moneyWhat you get for the price, including the free plan. | 4.0 | 4.5 | 3.5 |
| Speed & reliabilityHow fast it is and how often it falls over. | 4.5 | 4.0 | 3.5 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Claude Code | OpenAI Codex | Vapi |
|---|---|---|---|
| Access & platform | |||
| Free plan | No | Yes | No |
| Mobile app | Yes | Yes | – |
| Desktop app | Yes | Yes | – |
| Browser extension | No | No | – |
| API access | Yes | Yes | Yes |
| Teams & business | |||
| Team workspace | Yes | Yes | Yes |
| Enterprise plan or SSO | Yes | Yes | Yes |
| Connects to other apps | Yes | Yes | Yes |
| Open source or self-hosted | No | Yes | No |
| AI abilities | |||
| Works with your files | Yes | Yes | – |
| Understands images | Yes | Yes | – |
| Makes images | No | No | No |
| Makes video | No | No | No |
| Writes code | Yes | Yes | No |
| Runs agents or automations | Yes | Yes | Yes |
| Learns your brand or style | Yes | Yes | – |
| Works in many languages | Yes | Yes | Yes |
| Capabilities score | 12/ 17 | 14/ 17 | 6/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Claude Code | OpenAI Codex | Vapi |
|---|---|---|---|
| Plans | ProOur pick $20/mo, or $17/mo billed yearly Trying Claude Code and light daily use. | Free Free A quick look at what it can do. | Pay as you goOur pick $0.05/min hosting, plus provider costs Developers building and testing. |
Team From $20/seat/mo billed yearly, or $25 monthly Businesses with 2 to 150 people who want central billing. | Go $8/mo Occasional light tasks. | Core $29/mo plus usage Builders and early teams going live. | |
Enterprise $20/seat/mo billed yearly, 20-seat minimum Larger companies with compliance needs. | PlusOur pick $20/mo Anyone who already pays for ChatGPT. | Pro 10% of hosting fee, $999/mo minimum Teams running voice agents in production at scale. | |
Max From $100/mo Anyone running Claude Code for hours a day. | Pro From $100/mo Developers who hit the Plus limits. | Premier Custom Large organisations. | |
API (pay as you go) Usage based Teams who want to pay only for what they use. | Business $20/user/mo billed yearly, or $25 monthly Teams of 2 or more. | ||
Enterprise Custom Large organisations. | |||
| Which plan to pick | Start on Pro. It is enough to build a small site or tool in evenings and weekends. If you hit the limit most days, Max 5x is the next step; it costs five times as much but usually works out cheaper than paying for the API directly. Max also lets you spend up to half your weekly limit on Fable, which Pro only gets through paid credits. | If you already have ChatGPT Plus, you have Codex: just try it. If you are choosing between this and Claude Code with no existing subscription, Plus at $20 and Claude Pro at $20 cost the same, so pick whichever chat assistant you prefer. If you outgrow Plus, Pro starts at $100 and has no five-hour limit for now. The $200 tier gives new subscribers less usage than it used to, and Ultrafast mode is only on the $500 tier. | Build on pay as you go, then add Core when you go live and want email support. HIPAA compliance is a separate $2,000-a-month add-on, so check that early if you work in healthcare. |
Key features
| Attribute | Claude Code | OpenAI Codex | Vapi |
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Pros and cons
| Attribute | Claude Code | OpenAI Codex | Vapi |
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Who each one is for
| Attribute | Claude Code | OpenAI Codex | Vapi |
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Questions people ask
Which is better, Claude Code, OpenAI Codex or Vapi?
Claude Code scores highest overall in our ratings (Claude Code 4.4/5, OpenAI Codex 4.2/5 and Vapi 3.6/5). Claude Code is best for building features end to end and fixing bugs you can't find. OpenAI Codex is best for background tasks in the cloud and starting a task from your phone. Vapi is best for custom voice agents built by developers and agencies building AI receptionists for clients.
Which is cheaper, Claude Code, OpenAI Codex or Vapi?
Claude Code: There's no free plan. Paid plans start at $20/mo. OpenAI Codex: There's a free plan, and paid plans start at $8/mo. Vapi: There's no free plan. Paid plans start at $0.05/min hosting.
How we compare
Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.
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