What Is Claude Opus 5? Anthropic's Honeycomb Flagship

What Is Claude Opus 5? Anthropic’s Next Flagship, Codenamed Honeycomb

Claude Opus 5 is Anthropic's next-generation Opus flagship, first surfaced through a research model called "Honeycomb EAP" that briefly appeared inside the Cursor model picker around July 9, 2026 and was pulled within hours, then rolled out across providers on July 23, 2026. The spec profile that leaked in Cursor — a 1 million token context window, an "xhigh" reasoning effort mode, per-turn controls, and a safety fallback to Claude Opus 4.8 — matches the model now shipping. Claude Opus 5 succeeds Claude Opus 4.8, which had been the Opus flagship since May 28, 2026 at $5 per million input tokens and $25 per million output tokens. Anthropic itself has said little on the record around the rollout, and a full public model card and pricing page had not yet appeared at the time this article was updated.

Updated 2026-07-24: Claude Opus 5 began rolling out across providers on July 23, after missing a leaked July 20–21 window (see the Update sections below).

Key Takeaways

• Claude Opus 5 began rolling out across providers on July 23, 2026, with the rollout extending into July 24. It replaces Claude Opus 4.8 as the Opus flagship.
• The "Claude Honeycomb EAP" listing that appeared inside Cursor on July 9, 2026 is now understood to have been the early-access preview of Opus 5, per a detailed leak thread from @LuminaXspace.
• Confirmed spec profile from the Honeycomb listing that matches the rollout: 1 million token context window, an "xhigh" reasoning effort setting, per-turn controls, and a safety fallback that routes to Claude Opus 4.8 on trigger.
• The rollout was silent and phased: some accounts initially saw Opus 5 served under the "Opus 4.8" label before the switchover completed.
• Anthropic had not published an official Opus 5 model card or pricing page at the time of this update, and no first-party benchmark numbers are available.
• Community reports around launch point to pricing closer to Opus 4.8 than to Fable 5's $10/$50 per million tokens, but the final numbers are still unconfirmed.

What Is Claude Opus 5?

Claude Opus 5 is the newest entry in Anthropic's Opus tier, the "most capable" size class within the Claude model family. Anthropic has shipped four Opus 4.x releases in the prior generation — 4.5 in November 2025, then 4.6, 4.7, and 4.8 through mid-2026 — before crossing the Opus tier to 5 on July 23, 2026. Sonnet crossed to Sonnet 5 on June 30, 2026, and the new Mythos-class Fable 5 launched June 9, 2026; Opus 5 is the Opus-tier addition to that generation. We covered that rollout in detail in our report on Claude Fable 5’s return to AWS Bedrock and Claude Code.

Anthropic itself has said very little about Opus 5 on the record around the rollout. There was no press release published at the moment providers began serving the model, and a formal model card and pricing page entry had not surfaced by the time this article was updated. What is publicly known has been assembled from the Cursor EAP listing, the provider rollout on July 23, and the current shape of Anthropic's model lineup.

The status, in one sentence: Claude Opus 5 is Anthropic's newly rolled-out Opus flagship, matching the specification profile that leaked through the Honeycomb EAP listing in Cursor two weeks earlier.

Claude Opus 5 at a Glance

Field	Value
Developer	Anthropic
Type	Large language model, Opus-tier flagship
Modality	Text in, text out (vision expected based on Opus 4.x pattern; unconfirmed)
Codename	"Honeycomb" / "Honeycomb EAP" (early-access preview name)
Context window	1M tokens (as seen in the Honeycomb EAP listing)
Reasoning modes	Includes an "xhigh" (extra high) effort setting
Pricing	Not yet published by Anthropic
API model ID	Not yet published by Anthropic
Release date	July 23, 2026 (rollout across providers)
Availability	Rolling out across Anthropic API, Claude.ai, Claude Code, Vertex AI, and Bedrock
License	Proprietary (following prior Claude models)
Safety behavior	Per-turn controls with fallback to Claude Opus 4.8 on safety trigger

How Claude Opus 5 Works — What Makes It Different

The clearest technical signal comes from the brief Cursor appearance of Claude Honeycomb EAP on July 9, 2026, and the same spec profile carried through to the July 23 rollout. According to community screenshots and write-ups, the model's description read "Anthropic research model with per-turn controls and safety fallbacks," with a 1 million token context window and an "extra high" reasoning effort setting. When a safety fallback triggers, the request is routed to Claude Opus 4.8 — a chain that only makes sense if Opus 5 sits above 4.8 in capability.

Three coined feature anchors from the EAP listing are worth remembering, because subsequent write-ups will cite them:

• Honeycomb EAP — the Cursor-facing codename, where "EAP" reads as an early-access program label. The retail model that shipped is Claude Opus 5.
• xhigh effort mode — a reasoning-effort setting above the existing high tier, hinting at longer deliberation budgets for hard tasks.
• Per-turn controls with Opus 4.8 fallback — an architectural pattern where a stronger model gracefully hands off to a smaller confirmed model when safety classifiers fire.

Beyond those three specifics, everything about training data, parameter counts, and benchmark numbers is unpublished. Any post claiming exact SWE-bench, MMLU, or GPQA scores for Opus 5 today is inferring from vibes.

Source: @LuminaXspace

What You Can Do With Claude Opus 5

Based on the leaked positioning, Claude Opus 5 is aimed at the same workload Opus 4.8 already served, with an emphasis on long-running agents and coding. The LuminaXspace leak summary listed the expected focus as "long-running agents and advanced coding" at a capability closer to Anthropic's Fable/Mythos tier.

Practical use cases developers are now moving to Opus 5:

• Multi-hour autonomous coding runs inside Claude Code and Cursor, where Opus 4.8 previously capped out on long-horizon reliability.
• Whole-repository refactors and code review that benefit from the 1M-token context.
• Agentic tool-use loops (plan → call tool → read result → continue) with the xhigh effort mode reserved for hard planning steps.
• High-stakes reasoning that today gets routed to Fable 5 at $10/$50 per million tokens — Opus 5 is positioned as the cheaper alternative for workloads that don't require the Mythos tier.

None of this is verified against benchmarks. It reflects Anthropic's obvious product gap between Opus 4.8 and Fable 5, and the workloads the Opus tier has historically won.

How Claude Opus 5 Compares

The cleanest comparison is inside Anthropic's own current lineup. Confirmed rows come from Anthropic's live pricing and model pages; the Opus 5 row reflects the rollout status at the time of this update, with pricing and API ID pending an official Anthropic listing.

Model	Tier	Release	Input / Output per 1M tokens	Context
Claude Fable 5	Mythos	Jun 9, 2026	$10 / $50	1M
Claude Opus 5	Opus	Jul 23, 2026	Not yet published by Anthropic	1M
Claude Opus 4.8	Opus	May 28, 2026	$5 / $25	200K–1M (per Anthropic docs)
Claude Sonnet 5	Sonnet	Jun 30, 2026	$3 / $15 (post Aug 31)	1M
Claude Haiku 4.5	Haiku	Oct 15, 2025	$1 / $5	Standard

Bindu Reddy's pre-launch read on X captures the pricing risk that was floated: Claude Opus 5 "is coming as soon as next week... the worst case is it costs 2x that of Opus 4.8". A community post from @ChrissGPT pointed the other way, claiming Opus 5 would be "much cheaper than Fable 5" while beating GPT-5.6 Sol and Terra on SWE Pro. Post-launch chatter has leaned toward the cheaper end of that range, but final numbers await Anthropic's own pricing page. See our Claude Sonnet 5 deep dive for how Anthropic has been pricing the Sonnet-to-Opus gap this generation, and our Claude Fable 5 return analysis for context on the Mythos tier that Opus 5 sits beneath. For a spec-by-spec comparison with OpenAI’s flagship, see our Claude Opus 5 vs GPT-5.6 breakdown.

Availability: How to Access Claude Opus 5

Claude Opus 5 began rolling out across providers on July 23, 2026. The rollout has been silent and phased — Anthropic did not publish a launch post at the moment providers switched on the model, and multiple accounts reported initially seeing the new model served under the "Opus 4.8" label before the full switchover.

Two pre-release access signals worth remembering as context for the rollout:

• Cursor model picker — Claude Honeycomb EAP briefly appeared on July 9, 2026 and was removed within hours. That listing is now understood to have been the early-access preview of the model that shipped as Opus 5.
• Google Vertex AI Model Garden — a claude-opus-5 entry was reportedly seen on Vertex on July 14, 2026, per a prediction from @kimmonismus that "Claude Opus 5 on vertex means release is kinda imminent." That sighting preceded the July 23 provider rollout by roughly nine days.

Expect Claude Opus 5 on Anthropic's own API, Claude.ai (Pro, Max, Team, Enterprise tiers), Claude Code, AWS Bedrock, and Google Vertex AI, following the release pattern of Opus 4.5 through 4.8. Compare our earlier reporting on how Anthropic is shipping cross-platform this generation.

What We Don't Know Yet

Even with the model rolling out, several reference gaps remain that any near-term update to this page will fill in. Open questions:

• Official API model ID. No claude-opus-5 string has been formally published in Anthropic's docs, even as providers serve the model.
• Confirmed pricing. Anthropic has not posted a public price. Community estimates around launch cluster closer to $5/$25 than to Fable 5's $10/$50, but the final figures are pending.
• Benchmarks. No first-party SWE-bench, GPQA, or MMLU numbers are public. Claims that Opus 5 "beats GPT-5.6 Sol on SWE Pro" originate in an X post from @ChrissGPT without published evidence.
• Modality. Vision, PDF, and tool-use behavior have not been described in any first-party material.
• Fable 5 relationship. Whether Opus 5 stays clearly beneath Fable 5, and whether a Fable update follows to preserve the Mythos-tier gap, is unresolved.

Frequently Asked Questions

Is Claude Opus 5 out yet?

Yes. Claude Opus 5 began rolling out across providers on July 23, 2026, with the rollout continuing into July 24. It succeeds Claude Opus 4.8 as the Opus-tier flagship. A full Anthropic model card and public pricing page had not yet appeared at the time this article was updated.

What is Claude Honeycomb, and is it Claude Opus 5?

Claude Honeycomb, or "Honeycomb EAP", was the internal early-access preview name for what has now shipped as Claude Opus 5. It briefly appeared inside Cursor around July 8–9, 2026 with a 1M-token context window and an "xhigh" reasoning effort mode before being pulled, and the same spec profile matches the rollout that began on July 23.

When was Claude Opus 5 released?

Claude Opus 5 began rolling out across providers on July 23, 2026, after missing an earlier leaked July 20–21 window. The rollout was silent and phased, with some accounts initially seeing the new model served under the "Opus 4.8" label before the full switchover.

How much does Claude Opus 5 cost?

Anthropic has not published an official Opus 5 pricing page yet. Community reports around the rollout point to pricing closer to Opus 4.8's $5 input and $25 output per million tokens than to Fable 5's $10/$50, but the final figures should be treated as unconfirmed until Anthropic posts them.

What is Claude Opus 5's context window?

Claude Opus 5 has a 1 million token context window, matching the spec seen in the Honeycomb EAP listing and in line with Fable 5 and Sonnet 5. A minority of earlier community posts speculated 2 million tokens; that figure did not materialize.

Claude Opus 5 vs Claude Fable 5 — which is better?

Claude Fable 5 remains the top-tier Mythos-class model at $10 input and $50 output per million tokens with a 1M context window. Claude Opus 5 sits in the Opus tier beneath Fable 5, positioned to close the gap on agentic coding and long-context work while costing less than Fable. No first-party head-to-head benchmarks have been published.

How can developers access Claude Opus 5?

Claude Opus 5 is rolling out across the same surfaces as prior Opus models — the Anthropic API, Claude.ai (Pro, Max, Team, Enterprise), Claude Code, Google Vertex AI, and AWS Bedrock. Early reports indicate some accounts initially saw the new model served under the "Opus 4.8" label during the phased rollout.

What to Watch Next

Three concrete signals will fill in the remaining picture around this rollout. First, an Anthropic-hosted claude-opus-5 model card and pricing page entry — everything downstream of that (SDK support, official plan availability, rate limits) depends on it. Second, whether an updated Fable model appears to preserve the Mythos-tier gap now that Opus 5 has closed on it. Third, first-party benchmark numbers versus GPT-5.6 Sol and Terra on SWE-bench and long-horizon agent evals — the only way to test the "Opus 5 catches Fable" claim.

Update — 2026-07-16

The Vertex AI signal flagged on July 14 has now been echoed by @LuminaXspace on July 15, who reports Claude Opus 5 was "spotted on Google Vertex AI" and frames the listing as a late-stage pre-launch tell. This is a second-hand confirmation of the same Vertex sighting, not a fresh Anthropic disclosure — no claude-opus-5 model card or pricing has been published, and Google has not acknowledged the Model Garden entry.

Community timing chatter has also tightened. A r/ClaudeCode thread titled "Opus 5.0 coming this week" and a parallel r/ClaudeAI "Opus 5 coming soon?" discussion both frame a launch inside the July 13–19 week, with users explicitly tying the timing to Fable 5's July 19 subscription cutoff. Treat this as sentiment rather than signal — none of the posts cite a source beyond the same Vertex and Cursor leaks the article already covers — but the narrowing window is worth tracking against the "late July to early August" range noted above.

Update — 2026-07-24

Claude Opus 5 began rolling out across providers on July 23, 2026, after missing the leaked July 20–21 window flagged the week prior.

Building with Anthropic's next flagship class? On kie.ai you can try Claude Opus 5, Claude Opus 4.8, and Claude Sonnet 5.