4 ファイル変更 +22 -18
この更新の概要
モデル解説ドキュメントにおいて、プレースホルダーとなっていた表記が正式な「Claude Opus 4.8」に統一され、各プラットフォーム向けのAPI IDが明示されました。ウェブ版のドキュメントには、GitHubのマージコンフリクト発生時に自動修正が反応しない制限事項と、手動リベースによる解決策が追記されています。エラーハンドリングの解説では、使用中のインターフェース（CLI、非対話モード、Agent SDK）ごとに異なるエラー通知と解決方法が詳しく説明されるようになりました。ファストモードの価格表記についても、入力と出力それぞれの料金プランがより明確に整理されています。
プレースホルダーを「Claude Opus 4.8」に置き換え、API IDや各クラウドプラットフォームでの識別子を具体的に定義しました。
@@ -6,7 +6,7 @@ Claude is a family of state-of-the-art large language models developed by Anthro
## Choosing a model
If you're unsure which model to use, consider starting with **<NextOpus />** for the most complex tasks. It is Anthropic's most capable model for complex reasoning, long-horizon agentic coding, and high-autonomy work.
If you're unsure which model to use, consider starting with **Claude Opus 4.8** for the most complex tasks. It is Anthropic's most capable model for complex reasoning, long-horizon agentic coding, and high-autonomy work.
All current Claude models support text and image input, text output, multilingual capabilities, and vision. Models are available through the Claude API, [Claude Platform on AWS](/docs/en/build-with-claude/claude-platform-on-aws), [Amazon Bedrock](/docs/en/build-with-claude/claude-in-amazon-bedrock), [Vertex AI](/docs/en/build-with-claude/claude-on-vertex-ai), and [Microsoft Foundry](/docs/en/build-with-claude/claude-in-microsoft-foundry).
@@ -14,13 +14,13 @@ Once you've picked a model, [learn how to make your first API call](/docs/en/get
### Latest models comparison
| Feature | <NextOpus /> | Claude Sonnet 4.6 | Claude Haiku 4.5 |
| Feature | Claude Opus 4.8 | Claude Sonnet 4.6 | Claude Haiku 4.5 |
|:--------|:-------------|:------------------|:-----------------|
| **Description** | Anthropic's most capable model for complex reasoning and agentic coding | The best combination of speed and intelligence | The fastest model with near-frontier intelligence |
| **Claude API ID** | <NextOpusId /> | claude-sonnet-4-6 | claude-haiku-4-5-20251001 |
| **Claude API alias** | <NextOpusId /> | claude-sonnet-4-6 | claude-haiku-4-5 |
| **AWS Bedrock ID** | <NextOpusId platform="bedrock" /><sup>3</sup> | anthropic.claude-sonnet-4-6 | anthropic.claude-haiku-4-5-20251001-v1:0 |
| **Vertex AI ID** | <NextOpusId platform="vertex" /> | claude-sonnet-4-6 | claude-haiku-4-5@20251001 |
| **Claude API ID** | claude-opus-4-8 | claude-sonnet-4-6 | claude-haiku-4-5-20251001 |
| **Claude API alias** | claude-opus-4-8 | claude-sonnet-4-6 | claude-haiku-4-5 |
| **AWS Bedrock ID** | anthropic.claude-opus-4-8<sup>3</sup> | anthropic.claude-sonnet-4-6 | anthropic.claude-haiku-4-5-20251001-v1:0 |
| **Vertex AI ID** | claude-opus-4-8 | claude-sonnet-4-6 | claude-haiku-4-5@20251001 |
| **Pricing**<sup>1</sup> | \$5 / input MTok<br/>\$25 / output MTok | \$3 / input MTok<br/>\$15 / output MTok | \$1 / input MTok<br/>\$5 / output MTok |
| **[Extended thinking](/docs/en/build-with-claude/extended-thinking)** | No | Yes | Yes |
| **[Adaptive thinking](/docs/en/build-with-claude/adaptive-thinking)** | Yes | Yes | No |
@@ -35,9 +35,9 @@ _<sup>1 - See [Pricing](/docs/en/about-claude/pricing) for complete pricing info
_<sup>2 - **Reliable knowledge cutoff** indicates the date through which a model's knowledge is most extensive and reliable. **Training data cutoff** is the broader date range of training data used. For more information, see [Anthropic's Transparency Hub](https://www.anthropic.com/transparency).</sup>_
_<sup>3 - <NextOpus /> is available on Bedrock through [Claude in Amazon Bedrock](/docs/en/build-with-claude/claude-in-amazon-bedrock) (the Messages-API Bedrock endpoint).</sup>_
_<sup>3 - Claude Opus 4.8 is available on Bedrock through [Claude in Amazon Bedrock](/docs/en/build-with-claude/claude-in-amazon-bedrock) (the Messages-API Bedrock endpoint).</sup>_
_<sup>4 - On Microsoft Foundry, <NextOpus /> has a 200k-token context window. See [Claude in Microsoft Foundry](/docs/en/build-with-claude/claude-in-microsoft-foundry).</sup>_
_<sup>4 - On Microsoft Foundry, Claude Opus 4.8 has a 200k-token context window. See [Claude in Microsoft Foundry](/docs/en/build-with-claude/claude-in-microsoft-foundry).</sup>_
<Info>
[Claude Mythos Preview](https://anthropic.com/glasswing) is offered separately as a research preview model for defensive cybersecurity workflows as part of [Project Glasswing](https://anthropic.com/glasswing). Access is invitation-only and there is no self-serve sign-up.
@@ -54,11 +54,11 @@ You can query model capabilities and token limits programmatically with the [Mod
</Tip>
<Note>
On <NextOpus />, the `effort` parameter defaults to `high` on all surfaces, including the Claude API and Claude Code. Set `effort` explicitly to use a different level. See [Effort](/docs/en/build-with-claude/effort) for guidance on choosing a level.
On Claude Opus 4.8, the `effort` parameter defaults to `high` on all surfaces, including the Claude API and Claude Code. Set `effort` explicitly to use a different level. See [Effort](/docs/en/build-with-claude/effort) for guidance on choosing a level.
</Note>
<Note>
The Max output values above apply to the synchronous Messages API. On the [Message Batches API](/docs/en/build-with-claude/batch-processing#extended-output-beta), <NextOpus />, Opus 4.7, Opus 4.6, and Sonnet 4.6 support up to 300k output tokens by using the `output-300k-2026-03-24` beta header.
The Max output values above apply to the synchronous Messages API. On the [Message Batches API](/docs/en/build-with-claude/batch-processing#extended-output-beta), Claude Opus 4.8, Opus 4.7, Opus 4.6, and Sonnet 4.6 support up to 300k output tokens by using the `output-300k-2026-03-24` beta header.
</Note>
<section title="Legacy models">
@@ -82,7 +82,7 @@ The following models are still available. Consider migrating to current models f
| **Training data cutoff** | Jan 2026 | Aug 2025 | Jul 2025 | Aug 2025 | Mar 2025 | Mar 2025 | Mar 2025 |
<Warning>
Claude Sonnet 4 (`claude-sonnet-4-20250514`) and Claude Opus 4 (`claude-opus-4-20250514`) are deprecated and will be retired on June 15, 2026. Migrate to [Claude Sonnet 4.6](/docs/en/about-claude/models/overview#latest-models-comparison) and [<NextOpus />](/docs/en/about-claude/models/migration-guide#migrating-from-claude-opus-47) respectively before the retirement date.
Claude Sonnet 4 (`claude-sonnet-4-20250514`) and Claude Opus 4 (`claude-opus-4-20250514`) are deprecated and will be retired on June 15, 2026. Migrate to [Claude Sonnet 4.6](/docs/en/about-claude/models/overview#latest-models-comparison) and [Claude Opus 4.8](/docs/en/about-claude/models/migration-guide#migrating-from-claude-opus-47) respectively before the retirement date.
See [model deprecations](/docs/en/about-claude/model-deprecations) for details.
</Warning>
@@ -103,9 +103,9 @@ Claude 4 models excel in:
- For prompting best practices, see [Prompting best practices](/docs/en/build-with-claude/prompt-engineering/claude-prompting-best-practices).
- **Output quality**: When migrating from previous model generations to Claude 4, you may notice larger improvements in overall performance.
## Migrating to <NextOpus /> \{#migrating-to-claude-opus-4-8}
## Migrating to Claude Opus 4.8
If you're currently using Claude Opus 4.7 or earlier Claude models, see [Migrating to <NextOpus />](/docs/en/about-claude/models/migration-guide#migrating-from-claude-opus-47).
If you're currently using Claude Opus 4.7 or earlier Claude models, see [Migrating to Claude Opus 4.8](/docs/en/about-claude/models/migration-guide#migrating-from-claude-opus-47).
## Migrating to Claude Opus 4.7
@@ -694,6 +694,8 @@ When auto-fix is active, Claude receives GitHub events for the PR including new
- **Ambiguous requests**: if a reviewer's comment could be interpreted multiple ways or involves something architecturally significant, Claude asks you before acting
- **Duplicate or no-action events**: if an event is a duplicate or requires no change, Claude notes it in the session and moves on
GitHub does not emit a webhook when the base branch advances and creates a merge conflict, so auto-fix cannot react to conflicts on its own. To resolve a conflict, open the session and ask Claude to rebase.
Claude may reply to review comment threads on GitHub as part of resolving them. These replies are posted using your GitHub account, so they appear under your username, but each reply is labeled as coming from Claude Code so reviewers know it was written by the agent and not by you directly.
If your repository uses comment-triggered automation such as Atlantis, Terraform Cloud, or custom GitHub Actions that run on `issue_comment` events, be aware that Claude can reply on your behalf, which can trigger those workflows. Review your repository's automation before enabling auto-fix, and consider disabling auto-fix for repositories where a PR comment can deploy infrastructure or run privileged operations.
@@ -539,17 +539,19 @@ Claude Code sends beta-only fields such as `context_management`, `effort`, and t
### There's an issue with the selected model
The configured model name was not recognized or your account lacks access to it.
The configured model name was not recognized or your account lacks access to it. As of v2.1.160 the trailing hint, shown here in its interactive form, varies by surface.
```text
There's an issue with the selected model (claude-...). It may not exist or you may not have access to it. Run /model to select a different one.
There's an issue with the selected model (claude-...). It may not exist or you may not have access to it. Run /model to pick a different model.
```
**What to do:**
- Run `/model` to pick from models available to your account
- **Interactive CLI**: run `/model` to pick from models available to your account.
- **Non-interactive mode (`-p`)**: pass `--model` with a valid alias or ID, or set [`ANTHROPIC_MODEL`](/en/env-vars). The error text shows `Run --model` on this surface.
- **Agent SDK**: the error text omits the hint because the model is set programmatically. Set [`model` on `Options`](/en/agent-sdk/typescript#options) in TypeScript or [`ClaudeAgentOptions(model=...)`](/en/agent-sdk/python#claudeagentoptions) in Python, and handle the structured `model_not_found` error to surface your own retry or model picker.
- Use an alias such as `sonnet` or `opus` instead of a full versioned ID. Aliases track the latest release so they do not go stale. See [Model configuration](/en/model-config).
- If the wrong model keeps coming back, a stale ID is set somewhere. Check in [priority order](/en/model-config#setting-your-model): the `--model` flag, the `ANTHROPIC_MODEL` environment variable, then the `model` field in `.claude/settings.local.json`, your project's `.claude/settings.json`, and `~/.claude/settings.json`. Remove the stale value and Claude Code falls back to your account default.
- If the wrong model keeps coming back in the CLI, a stale ID is set somewhere. Check in [priority order](/en/model-config#setting-your-model): the `--model` flag, the `ANTHROPIC_MODEL` environment variable, then the `model` field in `.claude/settings.local.json`, your project's `.claude/settings.json`, and `~/.claude/settings.json`. Remove the stale value and Claude Code falls back to your account default.
- For Vertex AI deployments, see [Vertex AI troubleshooting](/en/google-vertex-ai#troubleshooting).
### Claude Opus is not available with the Claude Pro plan
@@ -20,7 +20,7 @@ Fast mode requires Claude Code v2.1.36 or later. Check your version with `claude
What to know:
- Use `/fast` to toggle on fast mode in the Claude Code CLI. Fast mode is not supported in the VS Code extension.
- Fast mode pricing is $10/$50 MTok on Opus 4.8 and $30/$150 MTok on Opus 4.7 and Opus 4.6.
- Fast mode pricing per MTok input/output is $10/$50 on Opus 4.8 and $30/$150 on Opus 4.7 and Opus 4.6.
- Available to all Claude Code users on subscription plans (Pro/Max/Team/Enterprise) and Claude Console.
- For Claude Code users on subscription plans (Pro/Max/Team/Enterprise), fast mode is available via usage credits only and not included in the subscription rate limits.