feat(pricing): add Bedrock rows for Opus 4.8/4.7 and Sonnet 5

[pgregg88]

Problem

_OFFICIAL_DOCS_PRICING has no bedrock rows for the current-gen Claude models, so us.anthropic.claude-opus-4-8, -opus-4-7, and -sonnet-5 sessions report Total cost: unknown on /usage. This is the newest-models facet of #50295.

Reproduce on main (291eae63b):

from agent.usage_pricing import get_pricing_entry
url = "https://bedrock-runtime.us-east-1.amazonaws.com"
get_pricing_entry("us.anthropic.claude-opus-4-8", provider="bedrock", base_url=url)  # None
get_pricing_entry("us.anthropic.claude-opus-4-7", provider="bedrock", base_url=url)  # None
get_pricing_entry("us.anthropic.claude-sonnet-5", provider="bedrock", base_url=url)  # None

Fix

Add three rows keyed on the bare anthropic.claude-* id (cross-region prefixes resolve via the existing normalizer):

Model	Input	Output	Cache write (5m)	Cache read
Opus 4.8	$5	$25	$6.25	$0.50
Opus 4.7	$5	$25	$6.25	$0.50
Sonnet 5	$3	$15	$3.75	$0.30

Sourcing. Rates are keyed to Anthropic's published list price (docs.anthropic.com + claude.com/pricing), which commercial Bedrock on-demand mirrors for the Claude line — the existing sonnet-4-5/sonnet-4-6 rows in this table already match Anthropic list exactly ($3/$15, cache $0.30/$3.75).

Provenance caveat (also in an in-code comment): AWS GovCloud carries a ~20% premium (Opus 4.8 = $6/$30 there), and the AWS Price List API had not published these SKUs machine-readably as of the 2026-07-07 us-east-1 offer (only Claude 2/3 are listed). So these are the commercial-list figures pending an authoritative AWS machine source. If a maintainer has confirmed commercial us-east-1 Bedrock numbers that differ, those should win.

Sonnet 5 uses the STANDARD rate ($3/$15), not the promotional launch price ($2/$10 in effect through 2026-08-31), so the snapshot doesn't silently under-report after the promo ends — matching the steady-state convention of every other row.

Scope / relationship to other work

• Complements fix(bedrock): add prompt-cache pricing to Claude Bedrock entries #46299 (open) — that PR adds cache-cost fields to the existing Bedrock Claude rows; this adds new rows. No overlap.
• Orthogonal to the -v1/date-suffix normalizer fix (separate PR). This test intentionally sticks to id shapes that resolve on main (bare + us./global. prefix) so it's independent of that change.
• Does not touch the stale anthropic.claude-opus-4-6 row ($15/$75, which predates Opus 4.6's actual $5/$25 list price) — flagged in Bedrock Claude /usage shows cost unknown — pricing table lacks cache cost fields + cross-region prefix normalization #50295 as a separate correctness fix to avoid conflicting with fix(bedrock): add prompt-cache pricing to Claude Bedrock entries #46299's edits to that row.

Test

test_bedrock_current_gen_claude_rows_resolve asserts each model resolves via bare id + cross-region prefix, resolves to the same entry across id shapes, carries cache fields, and is well-formed (output > input) — an invariant check, not frozen literals.

tests/agent/test_usage_pricing.py: 16 passed. Ruff clean. E2E: a cached Opus 4.8 session that previously priced as unknown now estimates ~$1.13.

[teknium1]

Thanks for isolating the missing-row facet; the live main pricing table still lacks Bedrock entries for these models (agent/usage_pricing.py:515-561).

Problems

• The Sonnet 5 row records the post-promotion $3/$15 rate at agent/usage_pricing.py:607-610. AWS currently states that $2/$10 applies through 2026-08-31, so this would overstate current /usage estimates.
• AWS documents au.anthropic.claude-opus-4-8 as a Geo inference ID, but _normalize_bedrock_model_name() only strips us., global., eu., ap., and jp. (agent/usage_pricing.py:692). That model ID will still miss the new bare key.

Suggested changes

• Encode the currently billed Sonnet 5 promotional pricing (with AWS-confirmed cache values), then update to the standard rate after the promotion.
• Add au. to the normalizer and cover it in test_bedrock_current_gen_claude_rows_resolve.

Automated hermes-sweeper review.

[teknium1]

AWS's Bedrock pricing page says Sonnet 5 is currently $2/$10 per million input/output tokens through 2026-08-31. This $3.00/$15.00 standard-rate row will overstate /usage until then; please use the active rate (and corresponding confirmed cache rates) or defer this row until the promotion ends.

[teknium1]

Merged via PR #67976 — your Opus 4.8/4.7 pricing rows landed (and prompted a correction of the existing Opus 4.6 row, which still carried Claude-3-era $15/$75), credited via Co-authored-by. The sonnet-5 row had already landed via #67932. Your test matrix for cross-region resolution was carried over nearly verbatim — good test design.

Note on attribution: your commit was authored under a placeholder identity (hermes@covered-call-strategy.local), which we can't cherry-pick with authorship — check git config user.email for future PRs so your commits survive salvage intact with full credit. Thanks!

#67976