Compare verified pricing and model limits for limited-access premium routing against an available Anthropic baseline. The cost example uses a long-context research workload and does not assume equal model quality.
Mythos 5 carries twice the tracked standard input and output price of Opus 4.8 and is not generally available. Teams with Project Glasswing access should require a workload-specific result before moving traffic from the lower-priced baseline.
| Decision factor | Claude Mythos 5 | Claude Opus 4.8 |
|---|---|---|
| Standard token price | $10 input and $50 output per million tokens | $5 input and $25 output per million tokens |
| Availability | Limited to approved Project Glasswing customers | Generally available Claude model |
| Tracked limits | 1M context and 128k maximum output | 1M context and 128k maximum output |
Prices are USD per 1M tokens under each model's verified default profile.
| Field | Claude Mythos 5 | Claude Opus 4.8 |
|---|---|---|
| API access provider | Anthropic | Anthropic |
| API model ID | claude-mythos-5 | claude-opus-4-8 |
| Input / 1M | $10.00 | $5.00 |
| Cached input / 1M | $1.00 | $0.50 |
| Output / 1M | $50.00 | $25.00 |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Maximum output | 128,000 tokens | 128,000 tokens |
| Accepted input | text, image | text, image |
150,000 input and 5,000 output tokens per request, 2,000 monthly requests, and 10% cached input.
Cost result: Claude Opus 4.8 is $1,615.00 lower per month for these assumptions. This is a price comparison, not a model-quality ranking.
Models whose tracked context window is below the scenario input are excluded from the compatible-model table.
Latency, reliability, output quality, retries, regional processing, and provider-specific tool charges can change the practical decision.