Claude Opus 4.8 vs Claude Opus 5
At a Glance
| Compare | Claude Opus 4.8Anthropic | Claude Opus 5Anthropic |
|---|---|---|
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $5.00Anthropic ↗ · Sep 3, 2026 | $5.00Anthropic ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | $25.00Anthropic ↗ · Sep 3, 2026 | $25.00Anthropic ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | 1,000K | 1,000K |
| Model facts checked | Aug 29, 2026View model evidence → | Aug 28, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | Claude Opus 4.8 | Claude Opus 5 |
|---|---|---|
| ARC-AGI-1verified-v1-613c385b0c93 · verified_score · leader | 92.5095% of row best · percent · Claude Opus 4.8 (Max) | 97.50100% of row best · percent · Claude Opus 5 (Max) |
| ARC-AGI-2verified-v2-be40992860f9 · verified_score · leader | 72.0880% of row best · percent · Claude Opus 4.8 (High) | 90.42100% of row best · percent · Claude Opus 5 (Max) |
| LMArena Document Arenadocument-2026-09-13-a64ca3b12b6e · arena_rating · leader | 1,464.0797% of row best · rating · claude-opus-4-8; 95% CI [1457.10320334, 1471.03216030]; votes 12128; rank 19 | 1,516.27100% of row best · rating · claude-opus-5-high; 95% CI [1509.24512533, 1523.28765667]; votes 8794; rank 1 |
| LMArena Search Arenasearch-2026-10-13-a64ca3b12b6e · arena_rating · leader | 1,204.1197% of row best · rating · claude-opus-4-8; 95% CI [1198.48669076, 1209.73163091]; votes 106304; rank 19 | 1,241.57100% of row best · rating · claude-opus-5-high; 95% CI [1234.69644002, 1248.43868868]; votes 13285; rank 6 |
| LMArena Vision Arenavision-2026-10-09-a64ca3b12b6e · arena_rating · leader | 1,288.5298% of row best · rating · claude-opus-4-8; 95% CI [1282.01202676, 1295.03051235]; votes 18852; rank 29 | 1,319.22100% of row best · rating · claude-opus-5-high; 95% CI [1312.47954379, 1325.95953993]; votes 16665; rank 3 |
| LiveBench2026-06-25-90f8d44da965 · overall · leader | 81.1897% of row best · percent · claude-opus-4-8-max-effort · 24,171 output tokens / case | 83.44100% of row best · percent · claude-opus-5-max-effort · 14,826 output tokens / case |
| ToneBench2026-10-17-10-task-e9c76358afb2 · overall_score · unverified | 80.7097% of row best · points · Claude Opus 4.8 (max effort) · 46,601 output tokens / case | 83.25100% of row best · points · Claude Opus 5 (max effort) · 26,820 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above | 0 benchmark wins | 6 benchmark winsOverall lead |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | Claude Opus 4.8 | Claude Opus 5 |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Family | Claude 4 8 | Claude 5 |
| Model | Claude Opus 4.8 | Claude Opus 5 |
| Version | Claude Opus 4.8 | Claude Opus 5 |
| Lifecycle | active | active |
| Released | 2026-05-28 | 2026-07-24 |
| Knowledge cutoff | 2026-01-01 | Unknown |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,000K | 1,000K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Anthropic (Standard), Deepinfra (Standard) | Anthropic (Standard), Deepinfra (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, tools |
Claude Opus 4.8 Capabilities
Claude Opus 5 Capabilities
Related Comparisons
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|---|---|---|---|
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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 |  Qwen3.7 FlashQwen | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | cross-developer peersimage, text | |
Claude Opus 4.8Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Opus 4.8 vs Claude Opus 5 FAQs
Is Claude Opus 4.8 or Claude Opus 5 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Opus 4.8 and Claude Opus 5, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Opus 4.8 or Claude Opus 5?+
Claude Opus 4.8 is $5.00 and Claude Opus 5 is $5.00 per million tokens, so they are tied on this metric. Claude Opus 4.8 is $25.00 and Claude Opus 5 is $25.00 per million tokens, so they are tied on this metric.
Which has a larger context window, Claude Opus 4.8 or Claude Opus 5?+
Both models have the same sourced context window: 1,000,000 tokens each.
Which performs better in benchmarks, Claude Opus 4.8 or Claude Opus 5?+
Claude Opus 5 leads the current overall benchmark count. The result uses 6 protocol-matched benchmarks from 3 publishers; it is not a universal quality score.
Can Claude Opus 4.8 or Claude Opus 5 be self-hosted?+
Both models have the same sourced self-hosting status: unsupported. Claude Opus 4.8 is not marked open weight; Claude Opus 5 is not marked open weight.
Can Claude Opus 4.8 and Claude Opus 5 understand images?+
Claude Opus 4.8 is documented with image input; Claude Opus 5 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Opus 4.8 or Claude Opus 5?+
Both models have the same sourced maximum output: 128,000 tokens each.
Do Claude Opus 4.8 and Claude Opus 5 support reasoning and tool use?+
Claude Opus 4.8: reasoning, tool calling, and image input. Claude Opus 5: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Opus 4.8 or Claude Opus 5?+
Claude Opus 4.8 has 2 sourced provider routes; Claude Opus 5 has 3, so Claude Opus 5 has broader tracked availability.
Which offers better value, Claude Opus 4.8 or Claude Opus 5?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.