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Add Claude Mythos 5 and 5.1 pricing - #996
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Add claude-mythos-5 and claude-mythos-5-1 to the built-in Claude pricing table. Both bill input at 10 and output at 50 per million tokens with a 12.50 cache write; Mythos 5.1 cache reads are 0.25 per million, Mythos 5 cache reads are 1.00 per million. Mythos is absent from the models.dev catalog, so the built-in rows are what prices it. Upstream report-semantics version bump and predecessor parser hash are macOS-specific and not ported.
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📝 Walkthrough
Merge Risk: ⚪ Minimal · up to
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| Check name | Status | Explanation |
|---|---|---|
| Description Check |  |
Check skipped - CodeRabbit’s high-level summary is enabled. |
| Title check | |
The title is a short imperative summary that accurately describes adding pricing for Claude Mythos 5 and 5.1. |
| Linked Issues check | |
Check skipped because no linked issues were found for this pull request. |
| Out of Scope Changes check | |
Check skipped because no linked issues were found for this pull request. |
| Provider Data Stays Siloed | |
The pull request only adds two Claude model pricing rows and related pricing tests. The diff does not add identity, plan, account label, or email handling, and it does not add cross-provider branching… |
| Secrets Handled Safely | |
The PR changes only pricing code and tests. Added content contains model names, pricing values, expected test data, and a public documentation URL. No token, cookie, API key, OAuth credential, authori… |
| No Unapproved Dependencies | |
The pull request changes only Rust pricing source and test files. The authoritative diff contains no Cargo.toml, package.json, npm/yarn lockfile, pnpm lockfile, or packageManager changes. Maintainer a… |
| Ui Changes Include Windows Proof | |
The pull request changes only Rust pricing logic and tests: rust/src/core/cost_pricing.rs, rust/src/core/cost_pricing_tests.rs, and rust/src/cost_scanner/tests/claude_rates.rs. It does not chang… |
Full details: Provider Data Stays Siloed
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Explanation
The pull request only adds two Claude model pricing rows and related pricing tests. The diff does not add identity, plan, account label, or email handling, and it does not add cross-provider branching or matching on ProviderId values in shared code.
Full details: Secrets Handled Safely
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Explanation
The PR changes only pricing code and tests. Added content contains model names, pricing values, expected test data, and a public documentation URL. No token, cookie, API key, OAuth credential, authorization header, logging sink, user-facing error, credential file, or keyring operation was added or modified. The existing
secret-modeltest literals are unchanged context.
Full details: No Unapproved Dependencies
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Explanation
The pull request changes only Rust pricing source and test files. The authoritative diff contains no Cargo.toml, package.json, npm/yarn lockfile, pnpm lockfile, or packageManager changes. Maintainer approval is therefore not required.
Full details: Ui Changes Include Windows Proof
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Explanation
The pull request changes only Rust pricing logic and tests:
rust/src/core/cost_pricing.rs,rust/src/core/cost_pricing_tests.rs, andrust/src/cost_scanner/tests/claude_rates.rs. It does not change Windows UI files, tray rendering, the float bar, settings, or window chrome. Windows screenshots or a fresh-build proof note are not required.
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Port of the pricing part of upstream steipete/CodexBar steipete#4578 (
4654968e9) to Win-CodexBar.Branch:
port/claude-mythos-pricing(base96d5531e4), local commit7e626fcbb04f6b9e40a416a3fc7070b86cedccdb. Not pushed.Behavior
rust/src/core/cost_pricing.rs,CLAUDE_PRICING):claude-mythos-5: input 1e-5, output 5e-5, cache write 1.25e-5, cache read 1e-6 (USD per token; $10 / $50 / $12.50 / $1.00 per million).claude-mythos-5-1: same, but cache read 2.5e-7 ($0.25 per million).Not ported (macOS-specific):
Files
rust/src/core/cost_pricing.rsrust/src/core/cost_pricing_tests.rs:prices_claude_modelsextended;claude_pricing_rowssnapshot extended.rust/src/cost_scanner/tests/claude_rates.rs: new testclaude_mythos_models_price_from_the_builtin_table.No docs change: no Windows doc lists per-model prices.
Tests
claude_mythos_models_price_from_the_builtin_table: cache-read price 1.00 vs 0.25 per million, 20 tokens, both models.prices_claude_models: mythos-5 and mythos-5-1 resolve to 0.035 expected cost.claude_pricing_rowssnapshot: both rows pinned.Checks (local, Windows)
cargo fmt --all: clean.cargo clippy --manifest-path rust/Cargo.toml --all-targets -- -D warnings: clean.cargo test --manifest-path rust/Cargo.toml --lib cost_pricing: 41 passed.cargo test --manifest-path rust/Cargo.toml --lib mythos: 1 passed.cargo test --manifest-path rust/Cargo.toml --lib: 5280 passed, 0 failed, 2 ignored.cargo clippy --manifest-path apps/desktop-tauri/src-tauri/Cargo.toml --all-targets -- -D warnings: clean.cargo test --manifest-path apps/desktop-tauri/src-tauri/Cargo.toml: 804 passed, 0 failed.pnpm testnot run for this branch.Suggested fake-data proof
Write a local Claude transcript (synthetic) with
claude-mythos-5-1assistant usage rows: 1,000,000 input, 1,000,000 output, 1,000,000 cache-read tokens. Expected cost: $10 + $50 + $0.25 = $60.25. Seeing a non-zero cost in the cost history for that model confirms the built-in row is used.Summary by CodeRabbit