Benchmark avg
64.9
3 tracked scores
Anthropic · Proprietaryclaude-sonnet-4-5-20250929_16K
Active
Model portfolio
claude-sonnet-4-5-20250929_16K
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Anthropic · Closed · Context 200K tokens
Language Cap
147
Cadle Language Cap 147 · 45%
Benchmark average
—
Not enough benchmark results yet
Pricing
Unlisted
no list price
CADLE INSIGHTS
Only measured signals
Strongest signal
gpqa-diamond
Score 79.6
Blended $/1M
Unlisted
No published list price
Context
200K
Provider context window (not max output)
DESCRIPTION + DETAILS
PROVIDER
Anthropic
CONTEXT
200K tokens
STATUS
ACTIVE
COMMUNITY REVIEWS
Community Reviews & Field Notes
Verified EngineersReal operator evaluations, prompt robustness observations, and deployment notes for claude-sonnet-4-5-20250929_16K.
4.5(2)
Leave a Field Observation
Rating:5 - Frontier benchmark
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Reviews are publicly visible to the engineering community.
Inference OperatorProduction Deployer Verified
Oct 27, 2026
Tested claude-sonnet-4-5-20250929_16K on high-concurrency tool loops. Token generation remains consistent under sustained context load, with minimal prompt drift on complex JSON schemas.
Autonomous Agent LeadEval Maintainer Verified
Oct 23, 2026
Evaluated claude-sonnet-4-5-20250929_16K on multi-turn code synthesis. Code reasoning and diff application succeed on ~88% of test suites. Best paired with strict system prompt guardrails.
MODEL COMPARISON
| Metric | |
|---|---|
| Provider | Anthropic |
| Release | |
| Input / 1M | No data yet |
| Output / 1M | No data yet |
| Context | 200K tokens |
| Cadle Cap | 147 |
| Cap board | Cadle Language Cap 147 |
| metr-time-horizons | 67.4 |
| weirdml | 47.7 |
| gpqa-diamond | 79.6 |
DATA PROVENANCE
Scores may use different scales — check the Benchmarks tab for source links.
- Supabase models
- Cadle public observations
SOURCE TRACKING
Evidence linked to this model — listing, hub, benchmarks, or live gateway prices.
API
Anthropic listing