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Claude Opus 4.1 (2025-08-05)

API ID claude-opus-4-1-20250805

claude-opus-4-1-20250805 was an Anthropic model, released August 2025.

Status
Retired
Released
August 2025
Shutdown
Aug 5, 2026

claude-opus-4-1-20250805 stopped serving on August 5, 2026. Recommended replacement: claude-opus-4-8.

How to migrate to Claude Opus 4.8

Benchmarks

Scores as each source published them
or

Comparing with Claude Opus 4 (2025-05-14), the previous model in this line. A score is compared only with the same benchmark from the same source, at the same setting where both have it. Full comparison: prices, limits, features

Arena

ArenaClaude Opus 4.1 (2025-08-05)Claude Opus 4 (2025-05-14)ChangeRankDateSource
Text
Other settings
  • 1448 ±3 vs 1414 ±4
By category
  • Math 1444 rank 86 vs 1421 (+23)
  • Creative writing 1446 rank 49 vs 1433 (+13, within range)
  • Instruction following 1458 rank 54 vs 1444 (+14)
  • Hard prompts 1480 rank 67 vs 1457 (+23)
  • Long prompts 1485 rank 38 vs 1466 (+19)
  • Multi-turn 1471 rank 57 vs 1439 (+32)
  • Expert 1481 rank 71 vs 1450 (+31)
1450 ±31426 ±4+2480 of 415
49,548 votes		Oct 13, 2026source
Text: Coding
Other settings
  • 1505 ±5 vs 1464 ±7
1511 ±61498 ±8+13
within range		57 of 410
9,919 votes		Oct 13, 2026source
WebDev1390 ±11not rated96 of 142
6,928 votes		Oct 13, 2026source
Search1167 ±51152 ±6+1532 of 42
79,806 votes		Oct 13, 2026source

Rated as claude-opus-4-1-20250805-thinking-16k; Claude Opus 4 (2025-05-14) as claude-opus-4-20250514-thinking-16k. Ratings come from people voting between two anonymous answers; Text and Search are style-controlled, as on arena.ai. Not rated on Vision, where Claude Opus 4 (2025-05-14) is. Data: Arena (arena.ai), CC BY 4.0.

Epoch AI

BenchmarkClaude Opus 4.1 (2025-08-05)Claude Opus 4 (2025-05-14)ChangeSettingRunSource
FrontierMath Tier 42.4%not run32kJun 11, 2026source
FrontierMath Tiers 1-312.6%not run32kJun 11, 2026source
GPQA Diamond
Other settings
  • 76.8% vs not run 27k
  • 73.2% vs 69.2%
77.3%76.3%+1.0 pts16kAug 5, 2025source
OTIS Mock AIME 2024-2025
Other settings
  • 64.4% vs 60.0% 16k
  • 40.0% vs 42.2%
68.9%64.4%+4.5 pts27kAug 5, 2025source
SWE-bench Verified73.3%70.7%+2.6 ptsFeb 11, 2026source

Run independently by Epoch AI. Data: Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.

On cloud platforms

All platform dates
PlatformPlatform IDStateShutdownTime leftReplacementSource
Amazon Bedrockanthropic.claude-opus-4-1-20250805-v1:0LegacyJan 8, 202785 days—source
Microsoft Foundryclaude-opus-4-1Retired on August 5, 2026Aug 5, 2026Claude Opus 5claude-opus-5source

Amazon Bedrock retires this model 156 days after Anthropic's own API.

Microsoft Foundry retired this model on the same day as Anthropic's own API.

Read daily from each platform's own pages. The shutdown date and countdown on this page use Anthropic's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.

Price history

USD per 1M tokens, standard tier
$0.00$20.00$40.00$60.00$80.00$100.00Oct 2026In $15.00Out $75.00Oct 1, 2026 to Oct 15, 2026: Input $15.00, Output $75.00
$0.00$20.00$40.00$60.00$80.00$100.00Oct 2026In $15.00Out $75.00Oct 1, 2026 to Oct 15, 2026: Input $15.00, Output $75.00

We started recording this model's prices on Oct 1, 2026. The history grows with each daily check.

Show as a table
FromTypePrice
Oct 1, 2026Input$15.00
Oct 1, 2026Output$75.00

Prices

USD per 1M tokens, every type and band, by tier
TypePrice $/1MIn effect
Standard
input$15.00
cached input$1.50
cache write (5 min)$18.75
cache write (1 hour)$30.00
output$75.00
Batch
input$7.50
output$37.50

Changelog

Changes we detected on Anthropic's pages

No changes recorded yet.

Last checked · Sources: Anthropic models, Anthropic deprecations, Anthropic pricing, Anthropic model pages