VERIFIED COMPATIBILITY

Codex CLI, Claude Code, and API Protocol Compatibility Matrix

Review CodeNodex verification status for Codex CLI, Claude Code, OpenCode, and public API protocols, separating tested configuration, documented support, and conditional capability.

Data processing: Processed locally on this page
Content updated: 2026-07-19

VERIFICATION LAYERS

Compatibility must be verified layer by layer

A client starting successfully is only the first layer. Configuration parsing, protocol requests, streaming events, and tool behavior must all pass before a full workflow can be described as usable.

01
Configuration
Fields, file locations, and the current client version parse correctly
02
Protocol
Endpoint, auth headers, request body, and error semantics match
03
Transport
Streaming, timeouts, and cancellation behave correctly
04
Workflow
Tool calls, review, or automation paths have evidence

The matrix names its verification scope and never treats the existence of a static template as proof of a live end-to-end result.

STATIC VERIFIED DATA

Filter compatibility records

This is a manually verified snapshot from 2026-07-19. It does not request account, channel, or authenticated APIs, and each state covers only the evidence named in the verification scope.

ClientCapability status

Showing 5 of 5 records

CodeNodex client, protocol, version, and capability compatibility matrix
Client	Version baseline	Protocol	Capability status	Verification scope
Codex CLI	0.144.6Verified: 2026-07-19	OpenAI Responses	Verifiedconfig.tomlThe current template contains no unknown fields. VerifiedAuthentication fileUses a separate auth.json file. DocumentedInteractive tasksRun a read-only request before production use. ConditionalWebSocketWorks only on channels that expose the required transport capability.	The CodeNodex provider configuration passed strict config parsing. The model name is a CodeNodex provider ID.
CodeNodex CLI -> Codex	Repository template 2026-07-19Verified: 2026-07-19	OpenAI Responses	VerifiedAutomatic backupKeeps recoverable files before writing. VerifiedConfiguration mergePreserves user fields not owned by CodeNodex. VerifiedCODEX_HOMESupports a custom Codex configuration directory. ConditionalLive key validationDepends on the account, network, and current channel state.	Automatic templates, TOML merging, CODEX_HOME handling, and regression tests were reviewed.
Claude Code	Stable-channel docs 2026-07-19Verified: 2026-07-19	Anthropic Messages	DocumentedGateway variablesUses an Anthropic-compatible base URL and credentials. ConditionalSSE streamingRequires the channel to preserve all events and headers. ConditionalModel discoveryBoth the client and gateway must support it explicitly. UnsupportedWeb and SlackLocal gateway settings do not change hosted product routing.	Configuration paths and protocol boundaries were checked against stable official documentation without claiming an untested numeric version.
OpenCode	Integration template 2026-07-18Verified: 2026-07-19	OpenAI-compatible	DocumentedCustom endpointSupports a configurable public base URL. ConditionalText requestsDepends on the selected model and channel. ConditionalTool callsMust be verified for each model. DocumentedAutomatic setupCodeNodex CLI provides a matching template.	The public integration template is maintained; model capability depends on the current channel and OpenCode provider behavior.
OpenAI-compatible SDK	Protocol guide 2026-07-18Verified: 2026-07-19	OpenAI-compatible	DocumentedCustom base URLThe SDK must allow endpoint overrides. ConditionalStreamingDepends on the protocol, SDK, and channel. ConditionalStructured outputDepends on the model and compatibility implementation. ConditionalImage or mediaNot inferred from text-protocol compatibility.	The base URL and API key migration path is documented; advanced capabilities require SDK- and model-specific verification.

How to read the compatibility matrix

The version baseline is the latest client used to parse configuration or review documentation; it is not a promise of permanent compatibility. Verification scope distinguishes strict parsing, a maintained template, and behavior that still needs a live channel check.

A shared protocol does not guarantee identical capability. Streaming events, tool calls, model discovery, error shapes, and extension fields can all reduce client functionality.

Filter by client first
Check version and date
Read the verification scope
Run a minimal read-only request before production use

How the data is maintained

The matrix is a manually maintained static snapshot. It does not query authenticated capability APIs or infer support from marketing names. A status is promoted only when reviewable configuration, tests, or official protocol evidence exists.

CodeNodex provider model IDs are described separately from upstream official model IDs. Use the relevant public pages for the current model list, channel health, and live prices.

STATUS LANGUAGE

Four states represent different evidence strength

Each state communicates both existing evidence and checks still required before use, making revalidation after upgrades explicit.

01
Verified
The named version and scope were actively checked
02
Documented
A maintained configuration path exists without a full test claim
03
Conditional
Depends on a model, channel, feature flag, or extra protocol capability
04
Unsupported
The capability is outside the current product boundary

Every record includes a verification date; replace an old conclusion with new test evidence after a client or protocol changes.

Continue with another tool

Codex Config GeneratorChoose an endpoint, model, and reasoning effort to produce a reviewable Codex CLI configuration; write the real secret securely on your own machine.Open tool API Cost CalculatorSeparate input and output charges with an explicit formula, then compare the budget for one task, one session, or a batch of requests.Open tool

NEXT STEP

Move the local result into a real development workflow

Read the matching client guide, then create a separate API key and complete a minimal read-only verification.

View integration guides Sign up and create a key

Client

Version baseline

Protocol

Capability status

Verification scope

Codex CLI

0.144.6Verified: 2026-07-19

OpenAI Responses

Verifiedconfig.tomlThe current template contains no unknown fields.
VerifiedAuthentication fileUses a separate auth.json file.
DocumentedInteractive tasksRun a read-only request before production use.
ConditionalWebSocketWorks only on channels that expose the required transport capability.

The CodeNodex provider configuration passed strict config parsing. The model name is a CodeNodex provider ID.

CodeNodex CLI -> Codex

Repository template 2026-07-19Verified: 2026-07-19

OpenAI Responses

VerifiedAutomatic backupKeeps recoverable files before writing.
VerifiedConfiguration mergePreserves user fields not owned by CodeNodex.
VerifiedCODEX_HOMESupports a custom Codex configuration directory.
ConditionalLive key validationDepends on the account, network, and current channel state.

Automatic templates, TOML merging, CODEX_HOME handling, and regression tests were reviewed.

Claude Code

Stable-channel docs 2026-07-19Verified: 2026-07-19

Anthropic Messages

DocumentedGateway variablesUses an Anthropic-compatible base URL and credentials.
ConditionalSSE streamingRequires the channel to preserve all events and headers.
ConditionalModel discoveryBoth the client and gateway must support it explicitly.
UnsupportedWeb and SlackLocal gateway settings do not change hosted product routing.

Configuration paths and protocol boundaries were checked against stable official documentation without claiming an untested numeric version.

OpenCode

Integration template 2026-07-18Verified: 2026-07-19

OpenAI-compatible

DocumentedCustom endpointSupports a configurable public base URL.
ConditionalText requestsDepends on the selected model and channel.
ConditionalTool callsMust be verified for each model.
DocumentedAutomatic setupCodeNodex CLI provides a matching template.

The public integration template is maintained; model capability depends on the current channel and OpenCode provider behavior.

OpenAI-compatible SDK

Protocol guide 2026-07-18Verified: 2026-07-19

OpenAI-compatible

DocumentedCustom base URLThe SDK must allow endpoint overrides.
ConditionalStreamingDepends on the protocol, SDK, and channel.
ConditionalStructured outputDepends on the model and compatibility implementation.
ConditionalImage or mediaNot inferred from text-protocol compatibility.

The base URL and API key migration path is documented; advanced capabilities require SDK- and model-specific verification.

How to read the compatibility matrix

A shared protocol does not guarantee identical capability. Streaming events, tool calls, model discovery, error shapes, and extension fields can all reduce client functionality.

Filter by client first

Check version and date

Read the verification scope

Run a minimal read-only request before production use

How the data is maintained

CodeNodex provider model IDs are described separately from upstream official model IDs. Use the relevant public pages for the current model list, channel health, and live prices.

Compatibility must be verified layer by layer

Configuration

Protocol

Transport

Workflow

Filter compatibility records

How to read the compatibility matrix

How the data is maintained

Four states represent different evidence strength

Verified

Documented

Conditional

Unsupported

Continue with another tool

Move the local result into a real development workflow

Compatibility must be verified layer by layer

Configuration

Protocol

Transport

Workflow

Filter compatibility records

How to read the compatibility matrix

How the data is maintained

Four states represent different evidence strength

Verified

Documented

Conditional

Unsupported

Continue with another tool

Move the local result into a real development workflow