Migrating from claude-3-opus-20240229 to claude-opus-4-8
What changes when you move from claude-3-opus-20240229 to claude-opus-4-8: prices, limits, features and parameters, read from each company's own pages.
- Status
- Retired
- Shutdown
- Jan 5, 2026
- Time left
- —
- Status
- Active
- Shutdown
- not before May 28, 2027
- Time left
- —
Prices
USD per 1M tokens, standard tier| Type | claude-3-opus-20240229 | claude-opus-4-8 | Change |
|---|---|---|---|
| Input | Not published | $5.00first seen October 1, 2026 · source | — |
| Cached input | Not published | $0.50first seen October 1, 2026 · source | — |
| Output | Not published | $25.00first seen October 1, 2026 · source | — |
Other tiers, prompt-size bands and modalities are on each model's page.
Limits
Tokens| Limit | claude-3-opus-20240229 | claude-opus-4-8 | Change |
|---|---|---|---|
| Context window | Not published | 1,000,000 tokensin place when tracking began (October 6, 2026) · source | — |
| Max output tokens | Not published | 128,000 tokensin place when tracking began (October 6, 2026) · source | — |
Benchmarks
Same benchmark and source on both sides; settings named where they differ| Benchmark | claude-3-opus-20240229 | claude-opus-4-8 | Change |
|---|---|---|---|
Arena TextArena, high effort (vs no setting). Ranges don't overlap.Other settings
| 1322 ±3 | 1482 ±4 | +160 |
Arena Text: CodingArena, high effort (vs no setting). Ranges don't overlap.Other settings
| 1355 ±6 | 1533 ±6 | +178 |
Arena VisionArena, high effort (vs no setting). Ranges don't overlap.Other settings
| 1061 ±10 | 1286 ±6 | +225 |
GPQA DiamondEpoch AI, max effort (vs no setting).Other settings
| 47.2% | 91.0% | +43.8 pts |
OTIS Mock AIME 2024-2025Epoch AI, max effort (vs no setting).Other settings
| 4.7% | 98.3% | +93.6 pts |
| SimpleQA VerifiedEpoch AI, max effort (vs no setting). | 12.6% | 53.0% | +40.4 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 modelsNo feature is published for both models, so none can be compared.
Not published for claude-3-opus-20240229: 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-opus-4-8: Structured outputs, Function calling, PDF input, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs.
Aliases
All aliasesNo aliases point at either model.
On cloud platforms
All platform dates| Model | Platform | Platform ID | Shutdown | Time left |
|---|---|---|---|---|
| claude-3-opus-20240229 | Google Cloud Vertex AI | claude-3-opus | Aug 1, 2025Retired on August 1, 2025 | |
| claude-opus-4-8 | Amazon Bedrock | anthropic.claude-opus-4-8 | not before May 28, 2027Active | |
| claude-opus-4-8 | Microsoft Foundryversion 1 | claude-opus-4-8 | Sep 1, 2027Active | 321 days |
| claude-opus-4-8 | Microsoft Foundryversion 2 | claude-opus-4-8 | Sep 1, 2027Active | 321 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-3-opus-20240229toclaude-opus-4-8.
Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: claude-3-opus-20240229, claude-opus-4-8.