Migrating from claude-sonnet-4-20250514 to claude-sonnet-4-5-20250929

What changes when you move from claude-sonnet-4-20250514 to claude-sonnet-4-5-20250929: input price 0%, output price 0%.

From: claude-sonnet-4-20250514
Status: Retired
Shutdown: Jun 15, 2026
Time left: —

To: claude-sonnet-4-5-20250929
Status: Deprecated
Shutdown: Nov 30, 2026
Time left: 46 days

claude-sonnet-4-5-20250929 is itself deprecated, shutting down Nov 30, 2026. Its replacement is claude-sonnet-5-5.

Prices

USD per 1M tokens, standard tier

Type	claude-sonnet-4-20250514	claude-sonnet-4-5-20250929	Change
Input	$3.00first seen October 1, 2026 · source	$3.00first seen October 1, 2026 · source	0%
Cached input	$0.30first seen October 1, 2026 · source	$0.30first seen October 1, 2026 · source	0%
Output	$15.00first seen October 1, 2026 · source	$15.00first seen October 1, 2026 · source	0%

At 1M input and 250K output tokens a month: $6.75 on claude-sonnet-4-20250514, $6.75 on claude-sonnet-4-5-20250929 (0%).

Other tiers, prompt-size bands and modalities are on each model's page.

Limits

Tokens

Limit	claude-sonnet-4-20250514	claude-sonnet-4-5-20250929	Change
Context window	Not published	200,000 tokensin place when tracking began (October 6, 2026) · source	—
Max output tokens	Not published	64,000 tokensin place when tracking began (October 6, 2026) · source	—

Benchmarks

Same benchmark and source on both sides; settings named where they differ

Benchmark	claude-sonnet-4-20250514	claude-sonnet-4-5-20250929	Change
Arena TextArena, high effort 32k (vs thinking 32k). Ranges don't overlap. Other settings 1391 ±4 → 1455 ±3	1402 ±4	1456 ±3	+54
Arena Text: CodingArena, high effort 32k (vs thinking 32k). Ranges don't overlap. Other settings 1449 ±7 → 1512 ±5	1474 ±8	1519 ±5	+45
GPQA DiamondEpoch AI, 59k. Other settings 78.3% → 81.7% 32k 75.8% → 78.8% 16k 66.7% → 73.7%	79.2%	82.3%	+3.1 pts
MATH Level 5Epoch AI, 32k (vs no setting).	84.4%	97.7%	+13.3 pts
OTIS Mock AIME 2024-2025Epoch AI, 59k. Other settings 71.1% → 77.8% 32k 53.3% → 71.1% 16k 28.9% → 35.6%	68.9%	77.8%	+8.9 pts

A score from one source is never compared with another source's, and company-reported scores are compared only within the same company; settings named where they differ. Data: Arena (arena.ai), CC BY 4.0; Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.

Features and parameters

Compare models

No feature is published for both models, so none can be compared.

Not published for claude-sonnet-4-20250514: Structured outputs, Function calling, Prompt caching, Batch API, Image input, PDF input, Reasoning / thinking, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs, Context window, Max output tokens.

Not published for claude-sonnet-4-5-20250929: Structured outputs, Function calling, PDF input, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs.

Aliases

All aliases

No aliases point at claude-sonnet-4-20250514.

Aliases pointing at claude-sonnet-4-5-20250929: claude-sonnet-4-5 (in place when tracking began (October 6, 2026) · source)

On cloud platforms

All platform dates

Model	Platform	Platform ID	Shutdown	Time left
claude-sonnet-4-20250514	Amazon Bedrock	anthropic.claude-sonnet-4-20250514-v1:0	Oct 14, 2026Retired on October 14, 2026
claude-sonnet-4-5-20250929	Amazon Bedrock	anthropic.claude-sonnet-4-5-20250929-v1:0	Apr 8, 2027Legacy	175 days
claude-sonnet-4-5-20250929	Microsoft Foundryversion 1	claude-sonnet-4-5	Nov 30, 2026Active	46 days

Read daily from each platform's own pages. The status above uses each company's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.

Checklist

Change the model string from claude-sonnet-4-20250514 to claude-sonnet-4-5-20250929.

Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: claude-sonnet-4-20250514, claude-sonnet-4-5-20250929.