Identity
- Status
- active
- Developer ID
claude-opus-4-8- Released
- May 28, 2026
- Version
- Claude Opus 4.8
- License
- Unknown
AnthropicClaude Opus 4.8
Claude Opus 4.8 is Anthropic's still-available legacy Opus model.
- Context
- 1,000,000 tokens
- Inputs
- Text, Image
- Outputs
- Text
- Released
- May 28, 2026
Providers & Pricing
Estimate workload cost →| Provider | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M | Observed | Evidence |
|---|---|---|---|---|---|---|
AnthropicAvailable | $5.00 | $25.00 | $0.50 | $6.25 | Aug 29, 2026 | Provider-reported |
 DeepinfraAvailable | $5.00 | $25.00 | — | — | Sep 2, 2026 | Provider-reported |
Benchmarks
All benchmark results →| Claude Opus 4.8Anthropic | LiveBench2026-06-25 | 81.18 | 24,171 | 1,270 | claude-opus-4-8-max-effortaverage per case | Recomputedwinner eligible | Third-party benchmark |
| Claude Opus 4.8Anthropic | LMArena Document Arenadocument-2026-07-30-011508720696 | 1,474.59 | — | 8,388 | claude-opus-4-8-thinking; 95% CI [1466.45231317, 1482.72568328]; votes 8388; rank 12unknown | Original sourcewinner eligible | Third-party benchmark |
| Claude Opus 4.8Anthropic | LMArena Document Arenadocument-2026-07-30-011508720696 | 1,468.90 | — | 8,193 | claude-opus-4-8; 95% CI [1460.58009276, 1477.22476172]; votes 8193; rank 16unknown | Original sourcewinner eligible | Third-party benchmark |
| Claude Opus 4.8Anthropic | LMArena Search Arenasearch-2026-08-24-011508720696 | 1,204.30 | — | 70,998 | claude-opus-4-8; 95% CI [1197.89112684, 1210.71069451]; votes 70998; rank 12unknown | Original sourcewinner eligible | Third-party benchmark |
| Claude Opus 4.8Anthropic | LMArena Text Arenatext-2026-09-01-011508720696 | 1,461.14 | — | 48,467 | claude-opus-4-8-high; 95% CI [1456.88347873, 1465.40568534]; votes 48467; rank 31unknown | Original sourcewinner eligible | Third-party benchmark |
| Claude Opus 4.8Anthropic | LMArena Text Arenatext-2026-09-01-011508720696 | 1,451.98 | — | 49,123 | claude-opus-4-8; 95% CI [1447.69484580, 1456.25837678]; votes 49123; rank 38unknown | Original sourcewinner eligible | Third-party benchmark |
| Claude Opus 4.8Anthropic | LMArena Vision Arenavision-2026-08-27-011508720696 | 1,293.93 | — | 13,521 | claude-opus-4-8-high; 95% CI [1286.47351506, 1301.38306277]; votes 13521; rank 19unknown | Original sourcewinner eligible | Third-party benchmark |
| Claude Opus 4.8Anthropic | LMArena Vision Arenavision-2026-08-27-011508720696 | 1,288.81 | — | 13,980 | claude-opus-4-8; 95% CI [1281.38044914, 1296.24567110]; votes 13980; rank 23unknown | Original sourcewinner eligible | Third-party benchmark |
| Claude Opus 4.8Anthropic | ToneBench2026-08-14-10-task | 88.09 | 13,476 | 50 | Claude Opus 4.8 (max effort)average per case | Original sourcewinner eligible | Third-party benchmark |
| Claude Opus 4.8Anthropic | ToneBench2026-08-14-10-task | 86.53 | 3,264 | 50 | Claude Opus 4.8 (default)average per case | Original sourcewinner eligible | Third-party benchmark |
At a Glance
Model Facts
Capacity
- Context
- 1,000,000 tokens
- Maximum output
- 128,000 tokens
- Total parameters
- Unknown
- Active parameters
- Unknown
- Knowledge cutoff
- Jan 1, 2026
Interface and Access
- Inputs
- Text, Image
- Outputs
- Text
- API available
- Yes
- Open weights
- No
- Self-hostable
- No
- Reasoning
- Yes
- Vision
- Yes
- Tool calling
- Yes
- Capabilities
- chat, generation, reasoning, tools
This page represents one immutable developer model ID. Serving endpoints, pricing, regions, quantizations, and service tiers attach separately and never create duplicate model records.
Version Lineage
PredecessorUnknown
SuccessorsUnknown
Aliasesclaude-opus-4-8
Explicit Unknowns
- Architecture
- Tokenizer
Primary Evidence
Sources and Observation Date
Comparable Peers
Related Model Comparisons
| A | Pair | B | Context |
|---|---|---|---|
Claude Opus 4.8Anthropic | vs | Claude Opus 5Anthropic | family variantsimage, text |
Claude Opus 4.8Anthropic | vs | Claude Fable 5Anthropic | family variantsimage, text |
Claude Opus 4.8Anthropic | vs | Claude Mythos 5.1Anthropic | family variantsimage, text |
Claude Opus 4.8Anthropic | vs | Claude Sonnet 5Anthropic | family variantsimage, text |
Claude Opus 4.8Anthropic | vs |  MiniMax-M3MiniMax | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs |  GPT-5.6 LunaOpenAI | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | GPT-5.6 SolOpenAI | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | Grok 4.6xAI | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | cross-developer peersimage, text | |
Claude Opus 4.8Anthropic | vs | GPT-4.1OpenAI | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | GPT-4.1 MiniOpenAI | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | GPT-4.1 NanoOpenAI | cross-developer peersimage, text |
Questions
Claude Opus 4.8 FAQs
What is Claude Opus 4.8?+
Claude Opus 4.8 is Anthropic's still-available legacy Opus model. It is developed by Anthropic and its current sourced lifecycle status is active.
What inputs and outputs does Claude Opus 4.8 support?+
Claude Opus 4.8's current record lists Text and Image as input and Text as output.
How much context does Claude Opus 4.8 support?+
The current record lists a 1,000,000-token context window and a maximum output of 128,000 tokens.
Is Claude Opus 4.8 available through an API?+
Claude Opus 4.8 is marked as API-available. The directly sourced provider records currently include Anthropic and Deepinfra.
How much does Claude Opus 4.8 cost through an API?+
The lowest directly sourced prices currently attached to Claude Opus 4.8 are $5.00 per million input tokens through Anthropic and $25.00 per million output tokens through Anthropic. Prices are provider-specific and should be checked against each cited observation date.
What capabilities and tasks does Claude Opus 4.8 support?+
Claude Opus 4.8's recorded capabilities are chat, generation, reasoning, and tools. Its supported tasks are image and text.
Can Claude Opus 4.8 be self-hosted?+
Claude Opus 4.8 is not marked as an open-weight model. Self-hosting is marked as unsupported, with no license recorded.
Does Claude Opus 4.8 have related versions or aliases?+
No predecessor is recorded. No successor is recorded. Recorded aliases are claude-opus-4-8.
Which models can Claude Opus 4.8 be compared with?+
The current compatible peer set includes Claude Opus 5, Claude Fable 5, Claude Mythos 5.1, Claude Sonnet 5, and MiniMax-M3. Compatibility requires shared sourced modalities and tasks; it does not imply that one model is better. Browse model comparisons →
How current is the Model Markets record for Claude Opus 4.8?+
Claude Opus 4.8 was last verified Aug 29, 2026 from Anthropic's primary source, “Claude Opus 4.8 | Claude Platform Docs.” The evidence is classified as official fact.