# Amazon Bedrock AgentCore Code Interpreter vs Freestyle

> Amazon Bedrock AgentCore Code Interpreter scores 73.1 (BB) on agent readiness against Freestyle's 58.5 (C), and leads in 4 of 7 scored categories. Freestyle leads on schema & documentation, payments & pricing and maintenance & community. Both do sandbox code. Category scores…

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- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

Amazon Bedrock AgentCore Code Interpreter scores 73.1 (BB) on agent readiness against Freestyle's 58.5 (C), and leads in 4 of 7 scored categories. Freestyle leads on schema & documentation, payments & pricing and maintenance & community. Both do sandbox code.

- Amazon Bedrock AgentCore Code Interpreter: grade BB, 73.1/100, rank #89 of 842. Markdown https://www.anchorterminal.com/tools/agentcore-code-interpreter.md · JSON https://www.anchorterminal.com/api/v1/tools/agentcore-code-interpreter.json
- Freestyle: grade C, 58.5/100, rank #520 of 842. Markdown https://www.anchorterminal.com/tools/freestyle.md · JSON https://www.anchorterminal.com/api/v1/tools/freestyle.json

## Which one, for what

### Amazon Bedrock AgentCore Code Interpreter (BB)

Good for: A team already on AWS that wants agent code to run under IAM, inside a VPC and beside S3 data, for sessions up to eight hours.

Ahead on:
- Reliability, 85 against 43
- Agent ergonomics, 75 against 69
- Security & auth, 87 against 53
- Transparency & trust, 70 against 41

Also in its favour:
- Agent-ready, a grade of BB or better

Watch for: No pause, resume or snapshot. Session files are removed when the session ends, and persistence needs a customer-owned S3 Files or EFS mount inside a VPC

### Freestyle (C)

Good for: Suited to long-running agent work that needs a full Linux VM, memory-preserving pause, snapshots to branch from and private networking.

Ahead on:
- Schema & documentation, 86 against 81
- Payments & pricing, 45 against 30
- Maintenance & community, 71 against 65

Watch for: No terms of service or service agreement found on the site, and the privacy policy covers the website only


## Score by category

| Category | Weight | Amazon Bedrock AgentCore Code Interpreter | Freestyle | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 85 | 43 | Amazon Bedrock AgentCore Code Interpreter +42 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 81 | 86 | Freestyle +5 |
| Agent ergonomics | 13% (16.2 this run) | 75 | 69 | Amazon Bedrock AgentCore Code Interpreter +6 |
| Security & auth | 14% (17.5 this run) | 87 | 53 | Amazon Bedrock AgentCore Code Interpreter +34 |
| Payments & pricing | 10% (12.5 this run) | 30 | 45 | Freestyle +15 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 65 | 71 | Freestyle +6 |
| Transparency & trust | 7% (8.8 this run) | 70 | 41 | Amazon Bedrock AgentCore Code Interpreter +29 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **73.1 · BB** | **58.5 · C** | |

## Facts side by side

| Fact | Amazon Bedrock AgentCore Code Interpreter | Freestyle |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Amazon Web Services | Freestyle Cloud Inc. |
| Hosted endpoint | `https://bedrock-agentcore.{region}.amazonaws.com/code-interpreters/{id}/tools/invoke` | `https://api.freestyle.sh/v5` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Freemium |
| x402 | no | no |
| Licence | Proprietary service under the AWS Service Terms. The AgentCore SDKs for Python and TypeScript and the AgentCore MCP server are Apache-2.0 | Proprietary service with no published terms of service found. The `freestyle` SDK and CLI package on npm is MIT |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-07 | 2026-09-27 |
| Terms last updated | 2026-10-01 | no document linked |
| Privacy policy last updated | 2026-05-18 | no document linked |
| Customer content may train models | yes, with an opt-out |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 776 stars, 335k npm/wk | 72k npm/wk |

## Verdicts

**Amazon Bedrock AgentCore Code Interpreter.** Each session runs in its own microVM with 2 vCPU, 8 GB and a 10 GB disk for up to eight hours, and IAM can scope access to one interpreter. Sessions cannot be paused or resumed, and an AWS account with IAM set-up is needed before a first call.

**Freestyle.** A public OpenAPI 3.1 file describes 88 operations with a stable error code on every failure, and per-VM identity tokens keep the team API key away from end users. No terms of service, product privacy policy, request rate limit or incident history was found, and the only SDK is TypeScript.

## Before you call either

### Amazon Bedrock AgentCore Code Interpreter

1. Start a session with `StartCodeInterpreterSession`, then pass its id in the `x-amzn-code-interpreter-session-id` header on every `InvokeCodeInterpreter` call
2. Set `sessionTimeoutSeconds` when starting. The default is 900 seconds and the maximum is eight hours, and the session ends itself at the timeout
3. Stop sessions when done. Billing runs per second while code is busy, and a session left open counts against the 1,000 concurrent-session quota
4. Use `startCommandExecution`, `getTask` and `stopTask` for work longer than the 15-minute synchronous request limit
5. Retry `ThrottlingException` (429) and `InternalServerException` (500) with exponential backoff, and treat `ServiceQuotaExceededException`, returned as HTTP 402, as a quota to raise

### Freestyle

1. Send a `firewall` object on every `POST /v5/vms`. It is required, and a VM with no rules has no outbound internet
2. Ask the owner to run `freestyle login` in a browser once, then mint a key with `freestyle tokens create --output json`
3. Do not retry an exec that answers 409 `VM_NON_RESPONSIVE`. The command may already have run
4. Keep `exec-await` under its 300,000 ms cap and use a PTY session or `x-freestyle-background-after-secs` for longer work
5. Call the `/v5` paths. The unversioned duplicates in the OpenAPI file are marked deprecated

## Questions

### Which is better for AI agents, Amazon Bedrock AgentCore Code Interpreter or Freestyle?

Amazon Bedrock AgentCore Code Interpreter scores 73.1 (BB) on agent readiness against Freestyle's 58.5 (C), and leads in 4 of 7 scored categories. Freestyle leads on schema & documentation, payments & pricing and maintenance & community.

### Do Amazon Bedrock AgentCore Code Interpreter and Freestyle need an API key?

Both need an API key.

### Can an agent call Amazon Bedrock AgentCore Code Interpreter and Freestyle without installing anything?

Yes. Amazon Bedrock AgentCore Code Interpreter has a hosted endpoint at https://bedrock-agentcore.{region}.amazonaws.com/code-interpreters/{id}/tools/invoke and Freestyle at https://api.freestyle.sh/v5.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/agentcore-code-interpreter-vs-freestyle.json, and with the fewest tokens: https://www.anchorterminal.com/compare/agentcore-code-interpreter-vs-freestyle.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "agentcore-code-interpreter", "b": "freestyle"}`. From a terminal: `anchor compare agentcore-code-interpreter freestyle`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/agentcore-code-interpreter.json and https://www.anchorterminal.com/api/v1/tools/freestyle.json

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